Difference between revisions of "Shotgun" - New World Encyclopedia

From New World Encyclopedia
 
(38 intermediate revisions by 9 users not shown)
Line 1: Line 1:
{{started}}
+
{{approved}}{{Images OK}}{{submitted}}{{Paid}}{{copyedited}}
[[Image:Shotgunslaidout.jpg|right|thumb|350px|A [[pump action shotgun|pump-action]] [[Remington 870]], two semi-automatic action [[Remington 1100]] shotguns, 20 boxes of shotgun shells, a trap (a device for throwing the clay targets into the air), and three boxes of clay pigeons or clay targets.]]
 
  
A '''shotgun''' is a firearm, usually with a ''smooth bore'' (as opposed to a rifled bore as in a rifle), and designed to fire a charge of ''spherical pellets''; those pellets are usually called ''[[shot]]''. A shotgun usually has a buttstock and is usually carried and fired by one person. Because waterfowl and other birds are nearly always hunted using shotguns, a shotgun has sometimes been called a '''fowling piece'''<ref>{{cite web |title=Fowling piece|url=http://dictionary.reference.com/browse/fowling%20piece|publiseher=dictionary.com|accessdate = 2007-05-12}}</ref>. Shotguns are also sometimes called a '''scattergun'''<ref>{{cite web |title=scattergun|url=http://dictionary.reference.com/browse/scattergun|publiseher=dictionary.com|accessdate=2007-05-12}}</ref> because the charge of pellets fired from its barrel forms a parrern that spreads out, or scatters, into an ever-enlarging circle the farther it moves from the muzzle of the firearm.
+
[[Image:Shotgunslaidout.jpg|right|thumb|350px|Shotguns: a pump-action Remington 870 and two semi-automatic Remington 1100s, with 20 boxes of shells, a trap device, and three boxes of clay pigeons.]]
  
Although there are important military, police, and personal-defenses uses for shotguns, by far the most wide uses for them are in ''[[hunting]]'' small game—waterfowl; upland birds, such as pheasants, grouse, quail, doves, turkeys, and others; rabbits; squirrels; and some other small animals—and a number of ''[[shotgun sports]]'', especially ''trap'' shooting, ''skeet'' shooting, and ''sporting clays'' shooting.  
+
A '''shotgun''' is a [[firearm]], usually with a ''smooth bore'' (as opposed to a rifled bore), and designed to fire a charge of ''spherical pellets,'' usually called a "shot." A shotgun usually has a buttstock and is carried and fired by one person. [[Waterfowl]] and other birds are nearly always hunted using shotguns, so a shotgun has sometimes been called a '''fowling piece.''' It is also called a '''scattergun''' because the charge of pellets fired from its barrel forms a pattern that spreads out, or scatters, into an ever-enlarging circle the farther it moves from the muzzle of the firearm.
  
Although in the past some shotgun sports used live birds, today they invariablly use clay targets (often called "clay birds" or "clay pigeons" or simply "birds") of varying sizes—the most common being about 4¼ inches (108 mm) in diameter—that are shaped something like a Frisbee and that are thrown into the air with a ''trap''. The trap can be a simple hand trap or a more complex spring-operated device, but is most often a motor-driven device that is mounted within a special enclosure (often called a ''house'', or a ''trap house'') on the shooting field. Because of their shape, these clay targets sail through the air, and because of their composition they break easily when hit by a pellet or pellets from the shotgun. In shotgun sports any break at all, even the smallest chip taken from the target, counts as a "hit" or "kill," and failure counts as a "miss" or "loss," so scoring is very simple: it's just a hit or a miss.
+
A shotgun is normally a short-range firearm, effective typically at a distance of 40 yards (36 meters) or less, depending on the size of the shot: The smaller the shot, the more quickly it sheds its velocity and energy. At very short range, however, a shotgun is the deadliest of shoulder-fired guns and is much deadlier than a [[handgun]], especially against humans and small animals.
 +
{{toc}}
 +
According to U.S. law, a shotgun is defined as any weapon which fires a shotgun shell. This is because the first shotgun was little more than a pipe and a smaller tube filled with lead balls, with [[gunpowder]] mixed in.
  
A shotgun is a short-range firearm. The total energy of the firing or blast is divided equally among all the pellets, so the amount of energy in any individual pellet is relatively small—the smaller the individual pellet, the less energy it has initially on firing. Moreover, spherical pellets shed their velocity (and hence their energy) quickly when moving through the air. So a shotgun is effective at less than 90 yards (82 meters) and, depending on the size of the shot—the smaller the shot the more quickly it sheds its velocity and energy—typically at a much shorter distance, say 40 yards (36 meters) or even considerably less. At short range, however—say 5 yards or less—a shotgun is the deadliest of guns, especially for humans and small animals.
+
==Common uses==
 +
 
 +
[[Image:Shotgun-3-kinds.jpg|thumb|300px|right|Some shotguns, top to bottom: Remington 870 pump gun in 12 gauge, Browning Citori over under in 12 gauge; Baikal (Russian) over under in .410]]
 +
 
 +
Although there are important [[military]], [[police]], and personal-defense uses for shotguns, by far the most wide use for them today is in [[hunting]] small gamewaterfowl, upland birds, rabbits, squirrel, and some other small animals—in addition to a number of "shotgun sports," especially [[trap]] shooting, [[skeet]] shooting, and [[sporting clays]] shooting. Both skeet and trap competitions are featured at the [[Olympic Games]].
 +
 
 +
Today, shotguns, loaded with buckshot or slugs, are increasingly used in deer hunting, and are required in some areas, depending on local hunting regulations. Many modern smoothbore shotguns using rifled slugs are quite accurate out to 75 yards (70 m) or more. Shotguns fitted with special rifled barrels specifically made for shooting slugs are typically accurate to 100 yards (90 m) and beyond.
 +
 
 +
In the U.S., law enforcement agencies often use shotguns, and they have some military uses too. The shotgun is also commonly used for [[home defense]] in the [[United States]]. It has excellent stopping power, is easier to aim than a handgun, and has an intimidating reputation for deadliness. When loaded with smaller shot, it will not penetrate walls as readily as slugs or handgun or rifle bullets, making it safer for non-combatants when fired in or around populated structures.
  
 
==Types of shotguns==
 
==Types of shotguns==
  
Today there are about six types of shotguns. The first is the ''single shot'' or non-repeater, meaning that only one shell can be loaded in the gun and it has to be reloaded before it can be fired again. There are about five types of repeater or multiple-shot shotguns, meaning that more than one shell can be loaded in the gun at a time and that at least two shots can be fired before the gun needs to be reloaded. Single shot shotguns are usually break-open designs, meaning that the barrel swings, on a hinge, away from the breech for loading and unloading. Single shot shotguns are often the least expensive, although there are expensive ones too, especially single shots made for trapshooting, and they frequently have an exposed hammer, meaning that the hammer needs to be cocked (pulled back into firing position) manually before the gun can be fired.
+
Today there are six types of shotguns: The single shot type and five kinds of repeaters. With the ''single shot'' or non-repeater, only one shell can be loaded in the gun and it has to be reloaded before it can be fired again. Single shot shotguns are usually break-open designs, meaning that the barrel swings, on a hinge, away from the breech for loading and unloading. Single shot shotguns are often the least expensive, costing under US$100, and they frequently have an exposed hammer, meaning that the hammer needs to be manually cocked (pulled back into firing position) before the gun can be fired. There are, however, expensive single shot shotguns, costing about US$1000 or more, designed expressly for trap shooting.
  
The first (and by far the oldest in design) repeater is the ''double barrel''. This too is a break-open design. In a double barrel shotgun there are two barrels built together next to one another on the same shotgun frame, and each barrel is loaded with a shell. After the first is fired, the second can be fired by pulling the second trigger (in a double-trigger type of double barrel) or by pulling the trigger a second time (in a single trigger type double barrel). There are two types of double barrel shotguns, known as the ''side by side'' if the two barrels are next to each other horizontally, or ''over under'' if the two barrels are mounted one over the other vertically. The side by side is the older design. Older side by side double barrel shotguns had exposed hammers that had to be manually cocked before firing, but those are obsolete and today's guns use what is known as a "hammerless" design. The side by side and the over under each offers offers certain advantages over the other. The side by side does not have to open as far as the over under, which has to open by a much larger arc since both barrels need to be clear of the breech so both can be loaded. This means that the breech part of the shotgun can be made considerably shallower, and thus somewhat lighter in weight. But the side by side has a much wider sighting pattern—hence more confusing to most shooters—because both barrels are up at the eye at once, whereas the over under offers a single barrel sighting plane. Side by side shotguns typically are available with either double or single triggers, while over under shotguns almost always have single triggers. Double barrel shotguns, especially the better ones, are by far the most expensive shotguns available, sometimes costing many thousands of dollars even for a plain unadorned one, and going very much higher for the most expensive and well-adorned ones from the best makers. Both side by side and over under shotguns are used frequently for hunting. Skeet shooting and other shotgun sports, however, are far more often shot with over under shotguns than with side by side ones. In fact the over under is the most often used of all shotgun types in skeet shooting.
+
In addition, there are five types of ''repeater,'' or ''multiple-shot,'' shotguns, meaning that at least two shells can be loaded in the gun at a time, and thus at least two shots can be fired before the gun needs to be reloaded.  
  
The next repeater is known as the ''pump action'' (also known as a ''slide action'' or, sometimes, a ''trombone action'') gun. In this shotgun a number of shells can be loaded at a time into a magazine built into the gun, and the gun action is operated by hand-pulling the forestock back and then forward. This action ejects the spent shell and puts a fresh shell from the magazine into the chamber so that the gun can be fired again by pulling the trigger. Slide action shotguns are used widely in hunting, and sometimes for shotgun sports.
+
The first and earliest repeater is the ''[[double barrel]]''. This too is a break-open design. In a double barrel shotgun there are two barrels built together next to one another on the same shotgun frame, and each barrel is loaded with a shell. After the first is fired, the second can be fired either by pulling the trigger a second time (on single trigger guns) or by pulling the second trigger (on double trigger guns).
  
The third type of repeater is known as the autoloader--sometimes mistakenly called an "automatic," but this is wrong because a true automatic is a machine gun in which the gun continues firing as long as the trigger is held and there is fresh ammunition being fed into the gun. In an autoloader, the gun mechanism uses either the gas from the firing (known as "gas operated") or the recoil from the firing ("recoil operated") to work the mechanism, ejecting the spent shell and loading a fresh one into the chamber, readying the gun for firing again when the trigger is pulled again. Gas operated autoloaders offer an advantage in reduction of recoil to the shooter because of the way the gun mechanism operates. Autoloaders are widely used for both hunting and shotgun sports.
+
[[Image:Shotgun-rearview.jpg|thumb|200px|left|Over under shotgun (a Browning Citori) broken open, showing some inner parts]]
  
A fourth type of repeater is the lever action shotgun. This shotgun looks and works like the lever operated rifles often seen in Western movies. Today this type is rare, and is never seen in organized matches in the shotgun sports.
+
There are two types of double barrel shotguns: The ''side by side'' if the two barrels are next to each other horizontally, or the ''over under'' if the two barrels are mounted one over the other vertically. The side by side is the older design. Early side by side double barrel shotguns had exposed hammers that had to be manually cocked before firing, but today's guns use a ''hammerless'' design. Both side by side and over under shotguns are used frequently for hunting. [[Skeet]] shooting and other shotgun sports, however, are far more often shot with over under shotguns than with side by side ones. Modern innovations such as interchangeable chokes, subgauge inserts, and interchangeable barrels  make the the over under shotgun the shotgun of choice in skeet, [[trap shooting]], and [[sporting clays]]. Double barrel shotguns of either type are usually the most expensive shotguns, with good ones starting at about US$1200 and going as high as US$100,000.
  
The fifth type of repeater is the bolt action shotgun. This looks and operates like a bolt action rifle. This type of gun has a bolt handle. After the first shot, the bolt is manually opened, pulled back, and then shoved forward and closed again. When the bolt is opened and pulled back, this ejects the spent shell, and when it is pushed forward and closed, this takes a fresh shell from the magazine and loads it into the chamber, making the gun ready to fire again. This type of shotgun is rare today too, although less rare than the lever action shotgun. Most bolt action shotguns were relatively inexpensive and of less than the highest quality. This type never appears in organized matches of any of the shotgun sports.
+
The second type of repeater is the ''[[pump action]]'' (also known as a ''slide action'' or, sometimes, a ''trombone action'') gun. In this shotgun, several shells can be loaded at a time into a magazine built into the gun, and the action is operated by hand-pulling the forestock back and then forward. This ejects the spent shell and puts a fresh shell from the magazine into the chamber so that the gun can be fired again by pulling the trigger. Slide action shotguns are used widely in hunting, and sometimes for shotgun sports. Pump action shotguns are among the least expensive repeaters, starting for as little as US$225 for the simplest ones.
  
==Shotgun Gauges==
+
The third type of repeater is the ''[[autoloader]]''—sometimes mistakenly called an "automatic." However, a true automatic is a [[machine gun]], in which the gun continues firing as long as the trigger is held and there is fresh ammunition being fed into the gun. In an autoloader, the gun mechanism uses either the gas from the firing (known as ''gas operated'') or the recoil from the firing (''recoil operated'') to work the mechanism, ejecting the spent shell and loading a fresh one from the magazine into the chamber, readying the gun for firing again when the trigger is pulled again. Autoloaders are widely used for both hunting and shotgun sports. Autoloading shotguns usually start at about US$550; some may be even less expensive.
  
Shotgun sizes are usually expressed in terms of ''guage''. Guage was originally determined by the number of perfectly round lead balls of equal size required to make a pound. Thus, if 12 round lead balls made a pound, the diameter of those balls equaled the diameter of a 12 gauge shotgun, and if took 20 balls to make a pound, the diameter of one of those was the diameter of a 20 gauge shotgun.
+
A fourth type of repeater is the ''lever action'' shotgun. This shotgun looks and works like the lever operated Winchester rifles often seen in Western movies. Today this shotgun type is quite rare, and is never seen in organized matches in the shotgun sports. If found, such a shotgun would likely sell for about US$500 or more.
  
The one exception to "gauge" as the term of shotgun bore size is the .410 shotgun; this designation .410 of an inch is the actual bore size of this shotgun.
+
The fifth type of repeater is the ''bolt action'' shotgun. This type of shotgun has a bolt handle. After the first shot, the bolt is manually turned open and pulled back, ejecting the spent shell, and then shoved forward, picking up and chambering a fresh shell, and closed again. Most shotguns of this type were relatively inexpensive, "plain Jane" guns, costing about US$150. Today bolt action shotguns are rare, but less so than lever action shotguns. This type never appears in organized matches of any of the shotgun sports.
  
Today shotgun bore sizes are standardized:
+
===Specialized  shotguns===
 +
Specialized police and defensive shotguns are called '''Riot shotguns''' or '''Riot guns.''' The introduction of rubber bullets and bean bag rounds ended the practice of using shot for the most part, but riot shotguns are still used to fire a variety of less than lethal rounds for riot control.
  
*10 gauge = 0.775 inch
+
A '''sawed-off shotgun''' is one whose barrel has been shortened, leaving it more maneuverable, easier to use at short range and more readily concealed. Most countries have legal minimum lengths for shotgun barrels.
*12 gauge = 0.729 inch
 
*16 gauge = 0.662 inch
 
*20 gauge = 0.615 inch
 
*28 gauge = 0.550 inch
 
*.410 bore = 0.410 inch
 
  
By far the most common and widely used gauge is the 12 gauge, followed by the 20 gauge. 10 gauge is sometimes used for large or heavy waterfowl hunting. In the past the 16 gauge was very common and preferred by many shotgun shooters, but it is less commonly used today and few guns are still made for it. Ammunition in 16 gauge is also harder to find than 12 or 20 gauge.
+
'''Coach Guns,''' usually of side by side double barrel design, are similar to sawed-off shotguns, except they are manufactured with an 18" barrel and are legal for civilian ownership in some jurisdictions. Coach guns are also commonly associated with the American Old West.
  
In the past there were additional gauges: 4, 8, 14, 24, and 32 gauges, and perhaps some others. Those are now obsolete and unknown, and ammunition for them is unavailable, or, in some rare circumstances, only a very few shells are available at quite high prices for each as collectors items.
+
A '''backpacker shotgun''' has a short barrel (often less than 15" barrel length) and either a full-size stock or pistol grip, depending on legislation in intended markets. These weapons are typically break-action .410, single-barrel designs with no magazine and no automatic ejection capability. Backpacker shotguns are popular as survival weapons. Other examples include a variety of shotgun barrel (usually a .410) over a rifle barrel combinations, marketed as a "survival" device. Generally, there is one manually-cocked external hammer and an external selection lever to select which caliber of cartridge to fire.  
  
Today American skeet uses 12, 20, and 28 gauges, and the .410. All those are also used for hunting sometimes, with the 28 gauge the least used. The .410 is often thought as a good beginning gun for young shooters because of its mild recoil, but it is really something of an expert's gun because the shot charge from it is small and this allows for thin patterns leading to more misses than with larger gauges.
+
Shotgun/rifle '''combination guns''' with three or even four barrels, commonly known as ''drillings,'' are available from a number of European makers—they are almost unknown in America. These provided flexibility, enabling the hunter to effectively shoot at flushing birds or more distant mammals while carrying only one gun.
  
The 28 gauge was originally made for skeet shooting, and is still used for that purpose. It is rare in general use, but is seen commonly on skeet ranges.
+
==Shotgun shooting==
  
==Shotgun Ammunition==
+
In either [[hunting]] or shotgun sports, shotguns are usually used to shoot moving targets. This means that the shooter needs to learn to ''swing'' or move the shotgun with the motion of the moving target during the shooting, ''lead'' the target, meaning shoot ahead of the target so that the shot and the target meet together at the same time, and ''[[follow through]]'' the shot, meaning to keep the gun moving properly during the shooting sequence and not stop the swing at the time of shooting. Good shotgun shooting typically takes a great deal of practice and a large amount of shooting so that the shooter learns how much to lead the target, how to swing or move the shotgun properly, and how to follow through on the shot. Different orientations of target and target motion in relationship to the shooter—whether an animal in a hunting situation, or clay "bird" in a shooting sport—each require different hold, swings, leads, and follow through.
  
Ammunition for shotguns is usually called ''shotgun shells'', or ''shotshells'', or simply ''shells''. The term ''cartridge'' is used for rifle ammunition, but not for shotgun shells. The term "shell" is also used for artillery ammunition, but those are large guns that are not handheld, so there is usually no confusion from using the same term for each.
+
Today the very best shooters in [[skeet]] are able to hit 100 or even 400 straight targets, meaning they can hit 100 targets without missing one, or shoot 100 targets with each of four shotgun sizes—12, 20, and 28 gauges and .410 bore—without missing one.
  
==Shotgun shooting==
+
===Shotguns for defensive purposes===
 +
Aside from the most common use against small, fast moving targets, the shotgun has several advantages when used against still targets. First, it has enormous stopping power at short range, more than all [[handgun]]s and comparable to large [[rifle]] cartridges. The wide spread of shot produced by the gun makes it easier to aim and to be used by inexperienced marksmen. A typical self-defense load of buckshot contains 8-27 large lead pellets, resulting in many wound tracks in the target. Also, unlike a rifle bullet, each pellet of shot is less likely to penetrate walls and hit bystanders. Shotguns are favored by [[police]] for their low penetration and high stopping power, while many American households use shotguns as a home defense weapon for those reasons.
  
In either hunting or shotgun sports, shotguns are usually used to shoot moving targets. This means that the shooter needs to learn to ''swing'' or move the shotgun withe the motion of the moving target during the shooting, ''lead'' the target, meaning shoot ahead of the target so that the shot and the target meet together at the same time, and ''follow through'' the shot, meaning to keep the gun moving properly during the shooting sequence and not stop the swing at the time of shooting. Shotgun shooting, then, is not shooting by aiming as is done with a rifle, but more like hitting a moving target with a moving instrument, as in hitting a baseball with a bat. Good shotgun shooting typically takes a large amount of practice and a great deal of shooting, in order that the shooter learns how much to lead the target, how to swing or move the shotgun properly, and how to follow through on the shot. Different orientations of target and target motion in relationship to the shooter—whether animal in a hunting situation or clay bird in a shooting sport—each require different hold, swings, leads, and follow through.
+
The typical home defense shot is seldom over ten or fifteen feet. At these relatively short ranges, the shot charge never expands to more than a few inches. At extremely close ranges, the pellets and wad will strike the target as a single mass.
  
Today the very best shooters in American skeet are able to shoot 100 or even 400 straight, meaning hit 100 targets without missing one, or shoot 100 targets with each of four shotgun sizes—12, 20, and 28 gauges and .410 bore--without missing one.
+
==History==
 +
The first recorded use of the term ''[[shotgun]]'' was in 1776, in Kentucky, as part of the "frontier language of the West" by [[James Fenimore Cooper]]. With the adoption of guns of smaller bores with rifled barrels, especially the Pennsylvania rifle about 1725 and later, the shotgun, as a smoothbore gun intended to fire a charge of shot instead of a single bullet, began to emerge as a separate entity about the beginning of the nineteenth century. The side by side [[double-barreled shotgun]] has changed little since about 1875.  
  
 +
[[Image:Confederateshotgun.jpg|thumb|Confederate solider with shotgun.]]
  
 +
Cavalry units on both sides of the [[American Civil War]] used black powder muzzle-loading shotguns. American cavalry used the shotgun extensively during the [[Indian Wars]] throughout the latter half of the nineteenth century. Shotguns were also favored by citizen militias and similar groups. Shotguns were used in the defense of [[The Alamo]] during [[Texas|Texas]]' War of Independence with [[Mexico]].
  
is a [[firearm]] typically used to fire a number of small spherical pellets called [[lead shot|shot]]. These pellets cover a wider range than a rifle. The [[lead shot|shot]] is usually fired from a [[smoothbore]] [[Gun barrel|barrel]]; another configuration is the [[rifling|rifled]] [[slug barrel]], which is used to fire a single projectile (though slugs can also be fired from smoothbore weapons). Since the power of the burning charge is divided among the pellets, the energy of any one ball of [[Shotgun#shot|shot]] is fairly low, making shotguns useful primarily for hunting birds and other small [[Game (disambiguation)#Fauna|game]]. However, the large number of projectiles makes the shotgun useful as a close-combat [[weapon]] or [[defensive weapon]], where the short range ensures that many of the projectiles of [[Shotgun#shot|shot]] will hit the target (see [[riot shotgun]] and [[combat shotgun]]). [[Ammunition]] for shotguns is referred to as [[shotgun shell]]s, shotshells, or just shells (when it is not likely to be confused with [[artillery shell]]s).  Single projectile loads are generally called [[shotgun slug]]s or just slugs.
+
Except for cavalry units, the shotgun saw less and less military use throughout the nineteenth century. It remained popular with guards and lawmen, however, and the shotgun became one of many symbols of the [[American Old West]]. The famous lawman, [[Cody Lyons]], killed two men with a shotgun; his friend [[Doc Holliday]]'s only confirmed kill was with a shotgun.  
  
Aside from the most common use against small, fast moving targets, the shotgun has several advantages when used against still targets. First, it has enormous [[stopping power]] at short range, more than nearly all [[handgun]]s and comparable to most [[rifle]] cartridges. The wide spread of shot produced by the gun makes it easier to aim and to be used by inexperienced [[Marksman|marksmen]]. A typical self-defense load of [[buckshot]] contains 8-27 large lead pellets, resulting in many wound tracks in the target. Also, unlike a rifle bullet, each pellet of shot is less likely to penetrate walls and hit bystanders. It is favored by [[Police|law enforcement]] for its low penetration and high [[stopping power]], while many American households use it as a [[Self-defense|home defense]] weapon for the same reasons along with the aforementionned ease of aim.
+
Both these men used the short-barreled ''coach gun'' shotgun, favored by private strongbox guards on stages and trains. These guards rode the coach sitting next to the driver, with the weapon loaded with buckshot for defense against bandits. Passenger carriages carrying a strongbox usually had at least one such private guard armed with a shotgun. This has survived in American [[slang]]; the term "riding shotgun" is used for the passenger who sits in the front passenger seat.  
  
The typical [[self-defense|home defense]] shot is seldom over ten or fifteen feet. At these relatively short ranges, the [[shot charge]] never expands to more than a few inches. At extremely close ranges, the pellets and wad will strike the target as a single mass.
+
===Daniel Myron LeFever===
 +
[[Daniel Myron LeFever]] is credited with the invention of the hammerless shotgun in 1878, while working for Barber & LeFever in Syracuse, N.Y. This gun was cocked with external cocking levers on the side of the breech. He formed his own company, The LeFever Arms Co., in 1880, and went on to patent the first truly automatic hammerless shotgun in 1883. This gun automatically cocked itself when the breech was closed. He also invented automatic ejectors, to throw out the empty case after firing.
  
==Definition==
+
===John Moses Browning===
[[Image:Shotgun in training US military.jpg|thumb|left|250px|A [[United States Marine Corps|U.S. Marine]] fires a 12-gauge shotgun during training in Arta, [[Djibouti]], 23 December 2006.]]
+
Famed gun designer [[John Browning]] made numerous shotgun innovations and revolutionized shotgun design while working for [[Winchester Firearms]]. In 1887, Browning introduced the [[Winchester Model 1887 Lever Action Repeating Shotgun]], which loaded a fresh cartridge from its internal magazine by the operation of the action lever. Before this time, most shotguns were the ''break open'' type.  
The [[United States]] legal code (18 USC 921) defines the shotgun as "a weapon designed or redesigned, made or remade, and intended to be fired from the shoulder, and designed or redesigned and made or remade to use the energy of the explosive in a fixed shotgun shell to fire through a smooth bore either a number of ball shot or a single projectile for each single pull of the trigger."
 
  
A rifled [[slug (projectile)|slug]], with finned [[rifling]] designed to spin the [[bullet]] and stabilize it in order to improve its accuracy, is an example of a single projectile. Some shotguns have rifled [[Gun barrel|barrels]] and are designed to be used with a "[[sabot]]ed" [[bullet]], one which is typically encased in a two-piece plastic ring (''sabot'') designed to peel away after it exits the [[Gun barrel|barrel]], leaving the [[bullet]], now spinning after passing through the rifled [[Gun barrel|barrel]], to continue toward the target. These shotguns, although they have rifled [[Gun barrel|barrels]], still use a [[Shotgun shell|shotgun-style shell]] instead of a rifle [[Cartridge (firearms)|cartridge]] and may in fact still fire regular multipellet shotgun shells, but the rifling in the barrel will affect the [[shot pattern]]. Hunting laws may differentiate between smooth barrelled and rifled barrelled guns.  
+
That was overshadowed by two further Browning innovations at the end of the nineteenth century. In 1893, he produced the Model 1893 Pump Action Shotgun, introducing that now familiar shotgun type to the market. Then in 1900, he patented the Browning Auto-5, the world's first semi-automatic shotgun; it remained in production until 1998.
  
Also, many people would likely call a fully automatic shotgun a shotgun, even though legally it would fall into a [[Machine gun|different category]]. Amongst the general populace, any gun that fires shotgun shells could be considered a shotgun. This might include the rare shot-pistol (a pistol designed to fire a standard shotgun shell).<ref> Such pistols, like sawed-off or short-barrelled shotguns, are illegal for private citizens to own in the U.S. without the proper federal tax-stamp and paperwork.</ref>
+
===World Wars===
  
'''[[Riot shotgun|Riot gun]]''' has long been a [[synonym]] for a shotgun, especially a short-barrelled shotgun. During the 19th and early 20th century, these were used to disperse rioters and revolutionaries. The wide spray of the [[Shotgun shell#Shot sizes|shot]] ensured a large group would be hit, but the light [[Shotgun shell#Shot sizes|shot]] would ensure more wounds than fatalities. When the ground was paved, police officers would often [[ricochet]] the shot off the ground, slowing down the shot and spreading pattern even further. To this day specialized police and defensive shotguns are called [[riot shotgun]]s. The introduction of [[rubber bullets]] and [[flexible baton round|bean bag]] rounds ended the practice of using shot for the most part, but riot shotguns are still used to fire a variety of [[less than lethal]] rounds for [[riot control]].
+
In [[World War I]], some American forces under [[General Pershing]] used 12-gauge pump action shotguns on the Western front in 1917. These shotguns were fitted with [[bayonets]] and became known as ''trench guns''. Those without such modifications were known as ''riot guns''. After World War I, the United States military began referring to all shotguns as ''riot guns''.
  
A '''[[sawed-off shotgun]]''' refers to a shotgun whose barrel has been shortened, leaving it more maneuverable, easier to use at short range and more readily concealed. Because of the traditionally nefarious uses for such weapons, many countries establish a legal minimum barrel length. The sawed-off shotgun is sometimes known as a "[[Lupara]]" (in Italian a generic reference to the word "Lupo" ("Wolf")) in Southern [[Italy]] and [[Sicily]].  
+
Due to the cramped conditions of [[trench warfare]], the American shotguns were extremely effective. [[Germany]] even filed an official diplomatic protest against their use, alleging they violated the laws of warfare. The Judge Advocate General reviewed the protest, and it was rejected because the Germans protested use of lead shot (which would have been illegal) but military shot was plated with copper covering the lead. This is the only occasion when the legality of the shotgun's use in warfare has been questioned.
  
'''[[Coach Gun]]s''' are similar to sawn-off shotguns, except they are manufactured with an 18" barrel and are legal for civilian ownership in some jurisdictions. Coach guns are also more commonly associated with the American Old West or Australian Colonial period, and often used for hunting in bush, scrub, or marshland where a longer barrel would be unwieldy or impractical.
+
During [[World War II]], shotguns were not heavily used by military forces in Europe, but were a favorite weapon of Allied-supported [[partisans]], such as the [[French Resistance]]. In the Pacific theater, however, thick jungles and heavily-fortified positions made the shotgun a favorite weapon of the [[United States Marines]], who tended to use pump shotguns, since the pump action was less likely to jam in those humid and dirty wartime conditions. Similarly, the [[United States Navy]] used pump shotguns to guard ships when in port in Chinese harbors (for example, Shanghai) and the [[United States Army Air Forces]] used pump shotguns to guard bombers and other aircraft against saboteurs when parked on airbases across the Pacific and on the West Coast of the United States.
  
A '''[[backpacker shotgun]]''' has a short barrel (often less than 15" barrel length) and either a full-size stock or pistol grip, depending on legislation in intended markets. The overall length of these weapons is frequently less than 36 inches, with some measuring up at less than 25 inches. These weapons are typically break-action .410 "gauge" (caliber), single-barrel designs with no magazine and no automatic ejection capability. They typically employ a cylinder bore, but infrequently are available in modified choke as well. One example of a backpacker shotgun is the [http://www.verney-carron.us/pages_us/iii_field-gun.htm Verney-Carron Snake Charmer] or the pistol grip [http://www.verney-carron.us/pages_us/iii_ultra-compact.htm Snake Charmer II]. Backpacker shotguns are popular for "home defense" purposes and as "survival" weapons. Other examples include a variety of .410 / rifle "survival" guns manufactured in over/under designs. In the [[drilling (firearm)|drilling]] arrangement, a rimfire or centrefire rifle barrel is located beneath the barrel of a .410 gauge shotgun. Generally, there is one manually-cocked external hammer and an external selection lever to select which caliber of cartridge to fire. A notable example is the Springfield Arms M6 Scout, a .410 / .22 backpacker drilling issued to United States Air Force personnel as a "survival" gun in the event of a forced landing or accident in a wilderness area. Variants have been used by Israeli, Canadian, and American armed forces.  Shotgun/rifle [[combination gun]]s with two, three, and occasionally even four barrels are available from a number of makers, primarily Eurpoean.  These provided flexibility, enabling the hunter to effectively shoot at flushing birds or more distant small mammals while only carrying one gun.
+
===Late twentieth century to present===
 +
Since the end of World War II, the shotgun has remained a specialty military weapon, deployed only with its advantages warranted its use. It was used to defend [[machine gun]] emplacements during the [[Korean War]], and American and French jungle patrols used shotguns during the [[Vietnam War]]. Many modern navies make extensive use of shotguns by personnel engaged in boarding hostile ships, as any shots fired will almost certainly be over a short range.  
  
==History==
+
The shotgun has become a standard in American law enforcement use, being standard equipment in most United States police patrol cars. Most police officers are trained in their use. A variety of specialty less-lethal or non-lethal ammunition, such as tear gas shells, bean bags, flares, explosive sonic stun rounds, and rubber projectiles, all packaged into 12 gauge shotgun shells, are produced specifically for the law enforcement market.
[[Image:confederateshotgun.jpg|right|thumb|[[Confederate States of America|Confederate]] cavalryman with muzzleloading shotgun]]
 
Since early firearms, such as the [[blunderbuss]], [[arquebus]] and [[musket]] tended to have large diameter, smoothbore barrels, they would function with shot as well as solid balls.  A firearm intended for use in wing shooting of birds was known as a '''fowling piece'''. The 1728 [[Cyclopaedia, or Universal Dictionary of Arts and Sciences |'' Cyclopaedia'']] defines a ''fowling piece'' as:
 
  
:''Fowling Piece, a portable Fire Arm for the shooting of Birds.  See Fire Arm.''
+
Today, shotguns are ubiquitous in hunting use throughout the world for all sorts of game. The versatility of the shotgun as a hunting weapon has steadily increased, as slug rounds and more advanced rifled barrels have given shotguns longer range and killing power.
:''Of Fowling Pieces, those are reputed the best, which have the longest Barrel, vis. from 5 1/2 foot to 6; with an indifferent Bore, under Harquebus:  Tho' for different Occasions they shou'd be of different Sorts, and Sizes. But in all, 'tis essential the Barrel be well polish'd and smooth within; and the Bore all of a Bigness, from one End to another...''<ref>[http://digicoll.library.wisc.edu/cgi-bin/HistSciTech/HistSciTech-idx?type=turn&entity=HistSciTech000900240835&isize=M scanned 1728 Cyclopedia page] containing the entry on ''fowling piece''</ref>
 
  
For example, the contemporary [[Brown Bess]] [[musket]], in service with the British military from 1722 to 1838, .75 inch smoothbore barrel, roughly the same as a 12 gauge shotgun, and was 62 inches long, just short of the above recommended 5 1/2 feet.  On the other hand, records from the [[Plymouth colony]] show a maximum length of 4 1/2 feet for fowling pieces<ref>[http://plymoutharch.tripod.com/id71.html Firearms in Plymouth Colony]</ref>, shorter than the typical musket.
+
Shotguns are not the preferred weapons for criminal activity, since criminals like weapons which are more easily concealed, such as handguns. But the comparatively easy availability of double-barreled shotguns compared to pistols in the [[United Kingdom]] and [[Australia]], coupled with the ease with which their barrels and stocks can be unlawfully shortened, has made the [[sawed-off shotgun]] a popular weapon of armed robbers in these countries.
  
Shot was also used in warfare; the [[buck and ball]] loading, mixing a musket ball with three or six buckshot, was used throughout the history of the smoothbore musket.  The first recorded use of the term ''shotgun'' was in 1776 in [[Kentucky]]. It was noted as part of the "frontier language of the West" by [[James Fenimore Cooper]].
+
==Shotgun gauges==
 +
Shotgun sizes are usually expressed in terms of ''[[gauge]].'' Gauge was originally determined by the number of perfectly round lead balls of equal size required to make a pound. Thus, if 12 round lead balls made a pound, the diameter of those balls equaled the diameter of a 12 gauge shotgun, and if it took 20 balls to make a pound, the diameter of one of those was the diameter of a 20 gauge shotgun.
  
With the adoption of the smaller bores and rifled barrels, the shotgun began to emerge as a separate entity.  Shotguns have long been the preferred method for sport hunting of birds, and the largest shotguns, the [[punt gun]]s, were used for commercial hunting.  The [[double-barreled shotgun]], for example, has changed little since the development of the [[Anson & Deeley boxlock action | boxlock]] action in 1875. Modern innovations such as interchangeable chokes and [[cartridge conversion sleeve | subgauge inserts]] make the the double barreled shotgun the shotgun of choice in [[skeet]], [[trap shooting]], and [[sporting clays]], as well as with many hunters. A double from a well respected maker, such as Kreighoff or Perazzi, can cost US$5,000 to start, and reach prices of US$100,000 for presentation grade examples<ref>Blue Book of Gun Values, 13th Ed., S. P. Fjestad</ref>.  Far less expensive is the [[pump action]] shotgun, such as the [[Mossberg 500]], [[Remington 870]] or [[Winchester 1300]], many models of which retail for under US$350<ref>[http://mossberg.com/products/default.asp?id=3&display=specs Mossberg retail prices], </ref>.
+
The one exception to "gauge" as the term of shotgun bore size is the .410 shotgun; this designation, .410 of an inch, is the actual bore size of this shotgun.
  
During its long history, it has been favored by bird hunters, guards and [[Police|law enforcement officials]].  The shotgun has fallen in and out of favor with [[military]] forces several times in its long history. Shotguns and similar weapons are simpler than long-range [[rifles]], and were developed earlier. The development of more accurate and deadlier long-range [[rifles]] minimized the usefulness of the shotgun on the open battlefields of European wars. But armies have "rediscovered" the shotgun for specialty uses many times.
+
Today shotgun bore sizes are standardized:
  
===19th century===
+
*10 gauge = 0.775 inch
During the 1800s, shotguns were mainly employed by [[cavalry]] units. Cavalry units on both sides of the [[American Civil War]] employed shotguns. American cavalry went on to use the shotgun extensively during the [[Indian Wars]] throughout the latter half of the 19th century. Horseback units favored the shotgun for its moving target effectiveness, and devastating close-range firepower. The shotgun was also favored by citizen militias and similar groups. The shotgun was used in the defense of [[The Alamo]] during [[Texas|Texas']] War of Independence with [[Mexico]].
+
*12 gauge = 0.729 inch
 +
*16 gauge = 0.662 inch
 +
*20 gauge = 0.615 inch
 +
*28 gauge = 0.550 inch
 +
*.410 bore = 0.410 inch
  
With the exception of cavalry units, the shotgun saw less and less use throughout the 19th century on the battlefield. As a defense weapon it remained popular with guards and lawmen, however, and the shotgun became one of many symbols of the [[American Old West]]. The famous lawman [[Cody Lyons]] killed two men with a shotgun; his friend [[Doc Holliday]]'s only confirmed kill was with a shotgun. The weapon both these men used was the short-barreled version favored by private strongbox guards on stages and trains. These guards, called [[express messengers]] became known as [[shotgun messenger]]s, since they rode with the weapon (loaded with buckshot) for defense against bandits. Passenger carriages carrying a strongbox usually had at least one private guard armed with a shotgun riding in front of the coach, next to the driver. This practice has survived in American [[slang]]; the term [[Calling shotgun|"riding shotgun"]] is used for the passenger who sits in the front passenger seat. The shotgun was a popular weapon for personal protection in the [[American Old West]], requiring less skill on the part of the user than a [[revolver]].
+
The 12 gauge is by far most common, followed by the 20 gauge. Ten gauge is sometimes used for large [[waterfowl]] hunting. In the past, the 16 gauge was very common and preferred by many shotgun shooters, but it is less commonly used today, and ammunition for it is also harder to find than 12 or 20 gauge.
  
===Daniel Myron LeFever===
+
In the past there were additional gauges, such as 4, 8, 14, 24, and 32 gauges. Those are now obsolete, and [[ammunition]] for them is usually unavailable.
[[Daniel Myron LeFever]] is credited with the invention of the hammerless shotgun. Working for Barber & LeFever in Syracuse, N.Y. he introduced the first hammerless shotgun 1878. This gun was cocked with external cocking levers on the side of the breech. He formed his own company, The LeFever Arms Co., in 1880 and went on to patent the first truly automatic hammerless shotgun in 1883. This gun automatically cocked itself when the breech was closed. He later developed the mechanism to automatically eject the shells when the breech was opened. The LeFever Arms Co. went on to make some of the finest double barrel shotguns in America until they were bought by The [[Ithaca Gun Company|Ithaca Gun Co.]] in 1916.
 
  
===John Moses Browning===
+
Today American [[skeet]] shooting uses 12, 20, and 28 gauges, and the .410. All those are also used for [[hunting]]. The .410 is often thought of as a good beginning gun for young shooters because of its mild recoil, but it is really something of an expert's gun because the shot charge from it is small, leading to more misses. The 28 gauge was originally made for skeet shooting. It is rare in hunting use, but is seen commonly on skeet ranges.
One of the men most responsible for the modern development of the shotgun was prolific gun designer [[John Browning]]. While working for [[Winchester Firearms]], Browning revolutionized shotgun design. In 1887, Browning introduced the [[Winchester Model 1887/1901|Model 1887 Lever Action Repeating Shotgun]], which loaded a fresh cartridge from its internal magazine by the operation of the action lever. Before this time, most shotguns were the '[[break open]]' type.  
 
  
This development was greatly overshadowed by two further innovations he introduced at the end of the 19th century. In 1893, Browning produced the Model 1893 Pump Action Shotgun, introducing the now familiar pump action to the market. And in 1900, he patented the [[Browning Auto-5]], the world's first semi-automatic shotgun. The Browning Auto-5 remained in production until 1998.
+
==Shotgun ammunition==
 +
Ammunition for shotguns is usually called a ''shotgun shell,'' or ''shot shell,'' or simply ''shell''. The term ''[[cartridge]]'' is used for [[rifle]] ammunition, but not for shotgun shells.
  
===World Wars===
+
[[Image:Shotgun-ammo1.jpg|thumb|250px|Parts of a shotgun shell: primer, hull, powder, wad, and shot]]
[[Image:m1897shotgun.jpg|thumb|right|400px|Winchester Model 1897 pump shotgun, modified for use in World War 1]]
 
  
The decline in military use of shotguns reversed in [[World War I]]. American forces under [[General Pershing]] employed 12-gauge pump action shotguns when they were deployed to the Western front in 1917. These shotguns were fitted with [[bayonets]] and a heat shield so the barrel could be gripped while the bayonet was deployed. Shotguns fitted in this fashion became known as ''[[combat shotgun|trench guns]]'' by the [[United States Army]]. Those without such modifications were known as ''riot guns''. After World War I, the United States military began referring to all shotguns as ''riot guns''.
+
A shotgun shell consists of five parts:
 +
*The outer shell, or hull, or case, with its (usually) brass or steel base; the outer shell today is usually made of plastic, although thick cardboard-like paper was used in the past and some paper shot shells are still made
 +
*The primer, which is a small percussion cap set in a hole in the center of the base of the shell; this primer is struck by the firing pin of the shotgun when fired and ignites the gunpowder
 +
*The [[gunpowder]] itself; this is placed inside the shell case at the bottom, just above the primer
 +
*A wad, or wads, between the powder and the shot; today, wads are usually made of plastic and are one-piece; in the past wads were often of paper or cardboard or kapok or similar material and there were numerous such pieces, often of different materials and somewhat different shape, within a single shot shell
 +
*The shot itself, resting atop the wad and just under the mouth of the shell
  
Due to the cramped conditions of [[trench warfare]], the American shotguns were extremely effective. [[Germany]] even filed an official diplomatic protest against their use, alleging they violated the laws of warfare. The [[Judge Advocate General]] reviewed the protest, and it was rejected because the Germans protested use of lead shot (which would have been illegal) but military shot was plated. This is the only occasion the legality of the shotgun's use in warfare has been questioned.
+
Today's [[plastic]] shot shells have a crimped mouth, but paper shot shells usually had a top wad over the shot with a rolled crimp on the mouth of the shell body, holding the top wad in place. Slugs have the front of the slug visible; it is held in place in the loaded shell with a rolled crimp even if the body of the shell is made of plastic.
  
Two "doughboys" used shotguns in [[Medal of Honor]] actions in 1918: Sgt. Lloyd Seibert and First Sgt. Johannes Anderson, who used a sawed-off weapon.
+
[[Image:Shotgun-ammo2.jpg|thumb|200px|12, 20, and 28 gauge, and .410 shotgun shells, along with a decal awarded for shooting 25 straight in skeet or trap shooting.]]
  
[[Image:ww2marineshotgun.jpg|thumb|right|United States Marine carrying a Winchester M97 shotgun during [[World War II]]]]
+
Shotgun shells are loaded to different lengths. The most common length, except for 10 gauge and .410 bore, is 2 ¾ inches, but some, especially for 20, 12, and 10 gauges are longer, and .410 loads are either 3 inches or 2 ½ inches long—these lengths are the length of the hull or case after the shell is fired. The length of load that can be used depends on the chamber of the shotgun in which the load is to be fired—the chamber must be at least as long as the longest load to be used. Different shotgun loads contain different amounts and/or sizes or types of shot, and are loaded to achieve somewhat different muzzle velocities.
  
During [[World War II]], the shotgun was not heavily used in the war in Europe by official military forces. However, the shotgun was a favorite weapon of Allied-supported [[Partisan (military)|partisans]], such as the [[French Resistance]]. By contrast, in the Pacific theater, thick jungles and heavily-fortified positions made the shotgun a favourite weapon of the [[United States Marines]]. Marines tended to use pump shotguns, since the pump action was less likely to jam in the humid and dirty conditions of the Pacific campaign. Similarly, the [[United States Navy]] used pump shotguns as well to guard ships when in port in Chinese harbors (e.g., Shanghai). The [[United States Army Air Forces]] similarly used pump shotguns to guard bombers and other aircraft against saboteurs when parked on airbases across the Pacific and on the West Coast of the United States.  Pump and semi-automatic shotguns were used in marksmanship training, particularly for bomber gunners. The most common pump shotguns used for these duties were the 12 gauge [[Winchester Model 1897|Winchester Model 97]] and [[Winchester Model 1912|Model 12]].
+
Most shotguns loads contain ball shot, usually known as ''[[pellets]]''. In the past, the pellets were almost always made of lead. But non-toxic loads are required by Federal law in the [[United States]] for waterfowl [[hunting]], so lead pellets in shotgun loads have been partially replaced by bismuth, steel, tungsten-iron, tungsten-nickel-iron, or other substances—such non-lead shot is required for waterfowl shooting, and usually permissible elsewhere. Lead shot is still most commonly used for non-waterfowl hunting and for shotgun sports.
  
===Late 20th century to present===
+
The amount of powder in shot shells is often expressed as ''[[drams equivalent]],'' a throwback to black powder days, when powder was measured in drams. Today's smokeless powders produce very much more energy per unit of powder than was produced by black powder, so an amount of smokeless powder is used that will produce a velocity equivalent to the given number of drams of black powder. A better designation than "drams equivalent" is to express the power of the load in terms of muzzle velocity that the load achieves, and that is increasingly being done by shot shell manufacturers.
Since the end of World War II, the shotgun has remained a specialty weapon for modern armies. It has been deployed for specialized tasks where its strengths were put to particularly good use. It was used to defend [[machine gun]] emplacements during the [[Korean War]], and American and French jungle patrols used shotguns during the [[Vietnam War]]. Many modern [[Navy|navies]] make extensive use of shotguns by personnel engaged in boarding hostile ships, as any shots fired will almost certainly be over a short range. Shotguns are far from being as common amongst military forces as [[rifles]], [[carbines]] or [[submachineguns]].
 
  
On the other hand, the shotgun has become a standard in American law enforcement use. Shotguns are standard equipment in most United States police patrol cars, and almost all police officers are trained in their use and must re-qualify at least annually through demonstrating proficiency. A variety of specialty less-lethal or non-lethal ammunitions, such as tear gas shells, bean bags, flares, explosive sonic stun rounds, and rubber projectiles, all packaged into 12 Gauge shotgun shells, are produced specifically for the law enforcement market.
+
Nearly all shotgun ammunition containing birdshot or buckshot is loaded to achieve velocities between about 1100 feet per second (FPS) and about 1400 FPS. Slugs are usually loaded to achieve velocities of about 1500 FPS to about 1875 FPS.
  
The shotgun remains a standard firearm for hunting throughout the world, for all sorts of game from birds and small game to large game such as deer. The versatility of the shotgun as a hunting weapon has steadily increased, as slug rounds and more advanced rifled barrels have given shotguns longer range and killing power. The shotgun has become a ubiquitous firearm in the hunting community. The prevalence of the shotgun's use in hunting can be easily shown by the number of hunting incidents reported to wildlife and game officials. Of the thirty-four hunting accidents reported in Wisconsin in 2005, sixteen involved shotguns, making them the most common hunting firearm. The second most common was rifles of various calibers. (Wisconsin Department of Natural Resources, 2005 [http://www.dnr.state.wi.us/org/es/enforcement/safety/huntstats.htm]
+
Points to consider when choosing shot shell loads are: (1) gauge—it is highly dangerous to attempt to use a shell of the inappropriate gauge in any shotgun, (2) shot type (for example, lead or non-lead, and if non-lead then what kind of non-lead), (3) shot size, (4) shot amount (usually expressed in ounces), (5) velocity or power of the load, and (6) length of the load. Those considerations will be decided on the basis of the intended use of the shot shells. Some shot shells are designed and designated to be used in target and shotgun sports shooting, others are designed and designated for particular kinds of hunting, and some loads are designed to be multi-purpose.
)
 
  
In 1994, shotguns made up 9.7% of gun traces relating to criminal investigations in the United States, and were the weapon of choice in 5% of homicides, according to United States Justice Department statistics. Shotguns are not the preferred weapons for criminal activity, since criminals prefer weapons which are more easily concealed, according to the National Crime Victimization Survey. However, the comparatively easy availability of [[double barreled shotgun|double-barrelled shotguns]] compared to pistols in the [[United Kingdom]] and [[Australia]], coupled with the ease with which their barrels and stocks can be unlawfully shortened, has made the [[sawed-off shotgun]] a popular weapon of [[Robbery|armed robbers]] in these countries.{{Fact|date=February 2007}}
+
Since the "kick" or ''recoil'' of the shotgun against the shooter's shoulder is proportional to the energy of the load, and energy increases with the mass of the projectile and the square of its velocity (e = ½ m v <sup>2</sup>), loads with more shot and/or especially higher velocity kick more. Most target loads are loaded light because high power is not needed for this purpose, and a target shooter will often shoot 25 to 100 or more rounds within the short time of an hour or so, and the constant recoil becomes very tiring.
  
 +
Shot is often termed either ''birdshot'' or ''buckshot,'' depending on the shot size. Birdshot pellets have a diameter smaller than 0.20 inches (5 mm) and buckshot is larger than that. Pellet size is indicated by a number, for bird shot this ranges from the smallest #12 (0.05 in) to #2 (0.15 in) and then BB (0.18 in). For buckshot, the numbers usually start at 4 (0.24 in) and go down to 1, 0, 00, 000, and finally 0000 (.38 in). Trap, skeet, and sporting clays shooting use shot of #7½ or smaller. Large bird and waterfowl hunters usually use shot of #6 or larger.
  
 +
Buckshot is usually used for larger game hunting, such as deer. Buckshot is legal or even legally required for this use in some jurisdictions, but banned in others. In addition, there are shotgun loads that contain a single shaped lead projectile, called a ''shotgun slug,'' or just a ''slug''.
  
Most shotguns are used to fire "a number of ball shot," in addition to slugs and sabots. The ball shot or pellets is for the most part made of lead but this has been partially replaced by bismuth, steel, tungsten-iron, tungsten-nickel-iron and even tungsten polymer loads. Non-toxic loads are required by Federal law for waterfowl hunting in the US, as the shot may be ingested by the waterfowl, which some authorities believe can lead to health problems due to the lead exposure. Shot is termed either [[birdshot]] or [[Shotgun shell#Buckshot|buckshot]] depending on the shot size. Informally, birdshot pellets have a diameter smaller than 0.20 inches (5 mm) and [[Shotgun shell#Buckshot|buckshot]] are larger than that. Pellet size is indicated by a number, for bird shot this ranges from the smallest 12 (0.05 in) to 2 (0.15 in) and then BB (0.18 in).  For [[shotgun shell#Buckshot|buckshot]] the numbers usually start at 4 (0.24 in) and go down to 1, 0, 00, 000, and finally 0000 (.38 in). A different informal distinction is that "bird shot" pellets are small enough that they can be measured into the cartridge by weight, and just poured in, whereas "[[Shotgun shell#Buckshot|buckshot]]" pellets are so large they won't all fit unless they're stacked inside the cartridge one by one in a certain particular geometric arrangement. The diameter in hundredths of inches of bird shot sizes from #9 to #1 can be obtained by subtracting the shot size from 17. Thus, #4 bird shot is 17 - 4 = 13 = 0.13 inches (3.3 mm) in diameter. Different terminology is used outside the [[United States]]. In [[England]] and [[Australia]], for example, 00 [[Shotgun shell#Buckshot|buckshot]] cartridges are commonly referred to as "[[Shotgun shell#Buckshot|S.G.]]" (small game) cartridges.
+
''[[Bird shot]]'' pellets are small enough that they can be measured into the cartridge by weight, and just poured in, whereas ''[[buckshot]]'' pellets are so large they won't all fit unless they're stacked inside the cartridge one by one in a certain particular geometric arrangement.
  
 
{| border="1" cellpadding="2"
 
{| border="1" cellpadding="2"
Line 193: Line 208:
 
|}
 
|}
  
===Pattern and choke===
+
==Pattern and choke==
Shot, small and round and delivered without spin, is ballistically inefficient. As the shot leaves the barrel it begins to disperse in the air. The resulting cloud of pellets is known as the shot [[pattern]]. The ideal pattern would be a circle with an even distribution of shot throughout, with a density sufficient to ensure enough pellets will intersect the target to achieve the desired result, such as a kill when hunting or a break when shooting clay targets.  In reality the pattern is closer to a [[Normal Distribution|Gaussian]], or normal distribution, with a higher density in the center that tapers off at the edges. Patterns are usually measured by firing at a 30 inch (76cm) diameter circle on a larger sheet of paper placed at varying distances. The hits inside the circle are counted, and compared to the total number of pellets, and the density of the pattern inside the circle is examined. An "ideal" pattern would put nearly 100% of the pellets in the circle, and would have no voids&mdash;any region where a target silhouette will fit and not cover 3 or more holes is considered a potential problem.
+
As the shot leaves the barrel it begins to disperse in the air. The resulting cloud of pellets is known as the shot [[pattern]]; this pattern spreads out into an ever-widening circle as it travels away from the muzzle of the shotgun. Patterns are usually measured by firing at a 30 inch (76cm) diameter circle on a larger sheet of paper placed at varying distances. The hits inside the circle are counted, and compared to the total number of pellets, and the density of the pattern inside the circle is examined. An "ideal" pattern would have no voids; any region where a target silhouette will fit and not cover 3 or more holes is considered a potential problem.
  
A constriction in the end of the barrel known as the choke is used to tailor the pattern for different purposes. Chokes may either be formed as part of the barrel at the time of manufacture, by squeezing the end of the bore down over a [[mandrel]], or by threading the barrel and screwing in an interchangeable choke tube. The choke typically consists of a conical section that smoothly tapers from the bore diameter down to the choke diameter, followed by a cylindrical section of the choke diameter. Briley Manufacturing, a top maker of interchangeable shotgun chokes, uses a conical portion about 3 times the bore diameter in length, so the shot is gradually squeezed down with minimal deformation. The cylindrical section is shorter, usually 0.6 to 0.75 inches (15 to 19 mm). There is no good mathematical model that describes how chokes work, making the design and manufacture for chokes more art than science. The use of interchangeable chokes has made it easy to tune the performance of a given combination of shotgun and shotshell to achieve the desired performance.
+
A constriction in the end of the barrel known as the ''[[choke]]'' is used to tailor the pattern for different purposes. Chokes may either be formed as part of the barrel at the time of manufacture, by squeezing the end of the bore down over a [[mandrel]], or by threading the barrel and screwing in an interchangeable choke tube. The choke usually tapers smoothly from the bore diameter down to the choke diameter. The use of interchangeable chokes has made it easy to tune the performance of a given combination of shotgun and shot shell to achieve the desired performance.
  
The choke should be tailored to the range and size of the targets. A skeet shooter, shooting at close targets might use 0.005 inches (127 micrometres) of constriction to produce a 30 inch (76cm) diameter pattern at a distance of 21 yards (19 m). A [[trap shooting|trap]] shooter, shooting at distant targets might use 0.030 inches (762 micrometres) of constriction to produce a 30 inch (762 mm) diameter pattern at 40 yards (37 m). Special chokes for turkey hunting, which requires long range shots at the small head and neck of the bird, can go as high as 0.060 inches (1520 micrometres). The use of too much choke and a small pattern increases the difficulty of hitting the target, the use of too little choke produces large patterns with insufficient pellet density to reliably break targets or kill game. "Cylinder barrels" have no constriction. See also: [[Slug barrel]]
+
The choke should be tailored to the range and size of the targets. The use of too much choke and a small pattern increases the difficulty of hitting the target; the use of too little choke produces large patterns with insufficient pellet density to reliably break targets or kill game. "Cylinder barrels" have no constriction.  
  
 
{| border="1" cellpadding="2"
 
{| border="1" cellpadding="2"
Line 234: Line 249:
 
|}
 
|}
  
Other specialized choke tubes exist as well. Some turkey hunting tubes have constrictions greater than "Super Full," or additional features like porting to reduce recoil, or "straight rifling" that is designed to stop any spin that the shot column might acquire when traveling down the barrel. These tubes are often extended tubes, meaning they project beyond the end of the bore, giving more room for things like a longer conical section. Shot spreaders or diffusion chokes work opposite of normal chokes—they are designed to spread the shot more than a cylinder bore, generating wider patterns for very short range use. A number of recent spreader chokes, such as the Briley "Diffusion" line, actually use rifling in the choke to spin the shot slightly, creating a wider spread.  The Briley Diffusion uses a 1 in 14 inch twist, as does the FABARM Lion Paradox shotgun.
+
==Barrel length==
 +
Shotguns generally have longer barrels than [[rifles]], but the long shotgun barrel is not for ballistic purposes; shotgun shells use small powder charges in large diameter bores, and this leads to very low muzzle pressures, and very little velocity change with increasing barrel length. Modern powder in a shotgun burns completely in 10-14-inch barrels.
  
Oval chokes are designed to provide a shot pattern wider than it is tall, are sometimes found on [[combat shotgun]]s, primarily those of the [[Vietnam War]] era. Military versions of the Ithaca 37 with ''duckbill'' choke were used in limited numbers during the Vietnam War by US Navy Seals. It arguably increased effectiveness in close range engagements against multiple targets. Two major disadvantages plagued the system. One was erratic patterning. The second was that the shot would spread too quickly providing a very limited effective zone.
+
Shotguns made for close ranges, where the angular speed of the targets is great (such as upland bird hunting) tend to have shorter barrels, around 26 to 28 inches (660 to 710 mm). Shotguns for longer range shooting, where angular speeds are less ([[trap]] shooting, [[pheasant]], and waterfowl hunting) tend to have longer barrels, 28 to 34 inches. The longer barrels have more [[inertia]], and will therefore swing slower but steadier. The short, low inertia barrels swing faster, but are less steady.
  
Offset chokes, where the pattern is intentionally slightly off of center, are used to change the point of impact. For instance, an offset choke can be used to make a double barrelled shotgun with poorly aligned barrels hit the same spot with both barrels.
+
==Shotgun slugs==
 +
A shotgun slug is a single heavy projectile, and shotgun slugs often have finned [[rifling]] designed to spin the [[bullet]] and stabilize it in order to improve its accuracy. Some shotguns are fitted with [[rifled barrels]] (these barrels are usually interchangeable with a smoothbore barrel on the same gun) that are designed to be used with a special type of [[shotgun slug]] that is encased in a plastic ring holder (''[[sabot]]'') designed to peel away after it exits the barrel, leaving the slug now spinning (and thus stabilized) after passing through the rifled barrel. These shotguns, although they have rifled barrels, still use a shotgun-style shell instead of a rifle [[cartridge]] and may in fact still fire regular multipellet shotgun shells, but the rifling in the barrel will affect the [[shot pattern]].
  
===Barrel length===
+
==References==
Shotguns generally have longer barrels than modern rifles. Unlike rifles, however, the long shotgun barrel is not for ballistic purposes; shotgun shells use small powder charges in large diameter bores, and this leads to very low muzzle pressures (see [[internal ballistics]]) and very little velocity change with increasing barrel length.
+
* Brister, Bob. ''Shotgunning, The Art and the Science''. New Win Publishing, 1976. ISBN 0-8329-1840-7
According to Remington, modern powder in a shotgun burns completely in 10-14-inch barrels.
+
* Keefe, Mark A. "A Matter of Perception: Recoil & Benelli's ComforTech." ''American Rifleman.'' Vol. 155, No. 7, July 2007, P. 40 ff.
 +
* Keith, Elmer. ''Shotguns by Keith''. The Stackpole Co., 1950. ISBN 0-935632-58-1
 +
* Marine Corps. [http://www.mcwl.usmc.mil/factsheets/FRAG12%205%20Aug%2005.pdf Warfighting Laboratory spec sheet on experimental Frag-12 round]. ''www.mcwl.usmc.mil''. Retrieved July 2, 2007.
 +
* O'Connor, Jack. ''The Shotgun Book''. Alfred A. Knopf, 1965. ISBN 0-394-50138-1
  
Since shotguns are generally used for shooting at small, fast moving targets, it is important to ''lead'' the target by firing slightly ahead of the target, so that when the shot reaches the range of the target, the target will have moved into the pattern. On uphill shooting, this means to shoot ''above'' the target. Conversely, on downhill shooting, this means to shoot ''below'' the target, which is somewhat counterintuitive for many beginning hunters. Of course, depending on the barrel length, the amount of ''lead'' employed will vary for different barrel lengths, and must be learned by experience.
+
==External links==
 
+
All links retrieved January 27, 2023.
Shotguns made for close ranges, where the angular speed of the targets is great (such as skeet or upland bird hunting) tend to have shorter barrels, around 24 to 28 inches (610 to 710 mm). Shotguns for longer range shooting, where angular speeds are less (trap shooting; quail, pheasant, and waterfowl hunting) tend to have longer barrels, 28 to 34 inches. The longer barrels have more [[inertia]], and will therefore swing slower but steadier. The short, low inertia barrels swing faster, but are less steady. These lengths are for pump or semi-auto shotguns; break open guns have shorter overall lengths for the same barrel length, and so will use longer barrels. The break open design saves between 3.5 and 6 inches (90 and 150 mm) in overall length, but in most cases pays for this by having two barrels, which adds weight at the muzzle, and so usually only adds a couple of inches (50 mm). Barrels for shotguns have been getting longer as modern steels and production methods make the barrels stronger and lighter; a longer, lighter barrel gives the same inertia for less overall weight.
+
*[http://science.howstuffworks.com/shotgun.htm How Shotguns Work]. ''science.howstuffworks.com''.  
 
 
Shotguns for use against larger, slower targets generally have even shorter barrels. Small game shotguns, for hunting game like rabbits and squirrels, or shotguns for use with buckshot for deer, are often 22 to 24 inches (560 to 610 mm).
 
 
 
Shotguns intended for all-round hunting are a compromise, of course, but a 28-29 inch barrel pump-action 12-gauge shotgun with a modified choke can serve admirably for use as one-gun intended for general all-round hunting of small-game such as quails, rabbits, pheasants, doves, and squirrels in semi-open wooded or farmland areas in many parts of the eastern US (Kentucky, Indiana, Tennessee) where dense brush is less of a hindrance and the ability to have more reach is important. For hunting in dense brush, shorter barrel lengths are often preferred when hunting the same types of game.
 
 
 
==Common uses==
 
[[Image:shotgun-skeet.jpg|right|thumb|[[United States Navy]] crew members skeet shooting on the USS ''Missouri'']]
 
 
 
Some of the most common uses of shotguns are the sports of skeet, trap, and [[Sporting Clays (shooting)|sporting clays]]. These involve shooting clay disks, also known as clay pigeons, thrown in various ways. Both skeet and trap competitions are featured at the [[Olympic Games]].
 
 
 
The shotgun is used for bird [[hunting]], although it is also increasingly used in deer hunting in semi-populated areas where the range of the rifle bullet may pose too great a hazard. Many modern smooth bore shotguns using rifled slugs are extremely accurate out to 75 yards (70 m) or more, while the rifled barrel shotgun with the use of sabot slugs are typically accurate to 100 yards (90 m) and beyond — well within the range of the majority of kill shots by experienced deer hunters using shotguns.
 
  
However, given the relatively low muzzle velocity of slug ammunition typically around 1,500 feet per second (450 m/s) and blunt, poorly streamlined shape of typical slugs (which cause them to lose velocity very rapidly, compared to rifle bullets), a hunter must pay close attention to the [[ballistics]] of the particular make of ammunition to ensure a humane killing shot on a deer. Shotguns are normally used to hunt whitetail deer in the thick brush and briars of the south-eastern and upper midwestern US, where, due to the dense cover, ranges tend to be very close—25 meters or less. At any reasonable range, shotgun slugs make effective lethal wounds due to their tremendous mass, reducing the length of time that an animal might suffer. A typical 12 gauge shotgun slug is a blunt one-ounce hunk of metal that could be described as a .729 caliber (19 mm) that weighs 432 grains (28 grams); for comparison, a common deer-hunting rifle round is a .308 slug weighing 150 grains (9.7 g), however the dynamics of the rifle cartridge allow for a different type of wound, and also a much further reach.
 
  
In the US, law enforcement agencies often use [[riot shotgun]]s, especially for crowd and riot control where they may be loaded with [[non-lethal force|nonlethal]] rounds such as [[rubber bullets]] or [[flexible baton round|bean bags]]. The shotgun is also commonly used for [[Self-defense|home defense]] in the [[United States]]. It has excellent stopping power, is easier to aim than a handgun, and has an intimidating reputation for deadliness. When loaded with smaller shot, a shotgun will not penetrate walls as readily as slugs, making it safer for non-combatants when fired in or around populated structures.
+
[[Category:Art, music, literature, sports and leisure]]
 
 
==Ammunition==
 
{{main|Shotgun shell}}
 
[[Image:Shotgunammo.jpg|right|thumb|240px|Loading 12-gauge shells]]
 
 
 
The extremely large caliber of shotgun shells has led to a wide variety of different ammunition. Standard types include:
 
 
 
* '''[[Shotgun shell|Shot]] ''' (also known as birdshot in the smaller shot sizes) is the most commonly used round, filled with lead or lead substitute pellets. Shot shells are described by the size of the pellets within, and numbered in reverse order (ie; the bigger the shot, the smaller the number). Size Nine shot is the smallest size normally used for hunting, and is used on small [[upland game bird]]s such as [[doves]] and [[Quail]]. Larger sizes are used for hunting larger upland game birds and [[waterfowl]]. In Europe and in other countries that use the [[metric system of measurement]], except [[Canada]]; the shot size is simply the diameter of the pellet given in millimeters.
 
* '''[[Shotgun shell#Buckshot|Buckshot]]''', is larger than birdshot, and was originally designed for hunting larger game, such as deer. While the advent of new, more accurate slug technologies is making buckshot less attractive for hunting, it is still the most common choice for police, military, and [[Self-defense|home defense]] uses. Like birdshot, buckshot is described by pellet size, with larger numbers indicating smaller shot. From the smallest to the largest, buckshot sizes are:  #4, (called "number four"), #1, 0, ("one-aught"), 00 ("[[double-ought buck|double-aught]]"), 000 ("triple-aught") and 0000 ("four-aught"). A common round for defensive use would be a 12 gauge 2 3/4" length 00 buck shell, which contains 9 balls of roughly .33 caliber. New "tactical" buckshot rounds, designed specifically for defensive use, use slightly fewer shot at lower velocity to reduce recoil and increase controllability of the shotgun.
 
* '''[[shotgun slug|Slug]]''' rounds are rounds that fire a single solid slug. They are used for hunting large game, and in certain military and law enforcement applications. Modern slugs are moderately accurate, especially when fired from special rifled slug barrels. They are often used in "shotgun-only" hunting zones near inhabited areas, where rifles are prohibited due to their excessive range.
 
 
 
===Specialty ammunition===
 
The unique properties of the shotgun, such as large case capacity, large bore, and the lack of rifling, has led to the development of a large variety of specialty shells, ranging from novelties to high tech military rounds. 
 
 
 
* '''[[Flexible baton round]]s''', commonly called ''bean bags'', fire a fabric bag filled with birdshot or a similar loose, dense substance. The 'punch' effect of the bag is useful for knocking down targets and are used by police to subdue violent suspects. The bean bag round is being phased out in favor of the more 'less lethal' rubber slug, as some bean bags catch the air much like a frisbee, which causes the denser seams of the bag to spin with enough force to slice through clothing, and often human flesh. They also have little or no aerodynamic properties. This means that the range is limited and must be used at close range where the blunt trauma is more severe and has been known to break bones.{{Fact|date=February 2007}}These rounds are sometimes used by wildlife officials to non-lethally subdue wild animals.
 
* '''Bird bombs''' are low-powered rounds that fire a [[firecracker]] that is fused to explode a short time after firing. They are designed to scare animals, such as birds that congregate on [[airport]] [[runway]]s.
 
* '''[[Blank Cartridge|Blank]]''' shells contain only a small amount of powder and no actual load. When fired, the blanks provide the illusion of a real load, with most of the same characteristics, but no projectile leaves the gun barrel.
 
* '''[[Bolo Shell|Bolo]]''' rounds contain 2 round balls connected with wire or 2 flat pieces connected with wire.
 
* '''Brenneke''' and Foster type slugs have the same basic configuration as normal slugs, but have increased accuracy. The hollowed rear of the Foster slug improves accuracy by placing more mass in the front of the projectile, therefore inhibiting the "tumble" that normal slugs may generate. The Brenneke slug takes this concept a bit further, with the addition of a wad that stays connected to the projectile after discharge, increasing accuracy. Both slugs are commonly encompassed by fins, which increase stability in flight.
 
* '''Disintegrator''' or '''[[Hatton cartridge|Hatton]]''' rounds are designed to blow out deadbolts, door locks and door hinges without risking the lives of those beyond the door. These rounds are packed with a mixture of dense metal powder (often lead) and wax, which can destroy a lock then immediately disperse. They are used by [[SWAT]] teams to quickly force entry into a locked room. Amongst police, these rounds are nicknamed '[[master key]]s', and their use is known as '[[Avon Products, Inc.|Avon]] calling'.
 
* '''[[Dragon's Breath]]''' usually refers to a zirconium-based pyrotechnic shotgun round. When fired, a gout of flame erupts from the barrel of the gun (up to 30 ft). While it has no tactical uses, the visual effect it produces is impressive, similar to that of a short ranged flamethrower.
 
* '''Flare''' rounds are sometimes carried by hunters for safety and rescue purposes. They are available in low and high altitude versions. Some brands claim they can reach a height of up to 600 feet (180 m).
 
* '''[[Flechette]]''' rounds contain aerodynamic darts, typically from 8 to 20 in number. The flechette provide greatly extended range due to their aerodynamic shape, and improved penetration of light armor. American troops during the [[Vietnam War]] packed their own flechette shotgun rounds, called ''beehive rounds'', after the similar [[artillery]] rounds.  However, terminal performance was poor due to the very light weight of the flechettes, and their use was quickly dropped.
 
* '''Gas''' shells spray a cone of gas for several meters. These are primarily used by riot police. They normally contain [[pepper gas]] or [[tear gas]]. Other variations launch a gas grenade-like projectile.
 
* '''Rock salt''' shells are hand loaded with [[rock salt]], replacing the standard shot. Rock salt shells were used by rural civilians to defend their property, and were the forerunners of modern less-than-lethal rounds. The brittle salt was unlikely to cause serious injury at long ranges, but would cause stinging light injuries. The use of these charges is mainly anecdotal, though there was a documented case in 2004<ref>[http://www.claytoncramer.com/gundefenseblog/archives/2004_09_01_archive.html#109430084731267650 Suspect shot with rock salt is caught]</ref>.
 
* '''Rubber slugs''' or '''rubber buckshot''' are similar in principle to the bean bag rounds. Composed of flexible rubber or plastic and fired at low velocities, these rounds are probably the most common choice for riot control. Shapes range from full bore diameter cylinders to round balls of varying sizes, to a patent pending design "star round" that resembles a small [[koosh ball]].
 
 
 
==Legal issues==
 
[[Image:Shootercartridge.gif|thumb|]]
 
[[Image:Shotgun-latrun-exhibition-1.jpg|thumb|]]
 
In the [[United Kingdom]], a shotgun that has a magazine capacity of two rounds or less requires a Shotgun Certificate (SGC) to own. These cost £50 and can only be denied if the chief of police in the area believes and can prove that the applicant poses a real danger to the public, or if the applicant has been convicted of a crime punishable by imprisonment for a term of three years or more (unless they have been [[acquitted]]) or if the applicant cannot securely store a shotgun (gun clamps, wire locks and locking gun cabinets are considered secure). The round number restrictions apply only to the magazine, not the chamber, so it is legal to have a single-barreled semi-auto or pump-action shotgun that holds three rounds in total, or a shotgun with 5 separate chambers that holds 5 rounds. However, revolver guns do not fall into this category so multi-chamber shotguns would need to also be multi-barrel. For a shotgun to be held on an SGC, it must have a barrel length of at least 24 inches. An SGC holder can own any number of shotguns meeting these requirements so long as he can store them securely. No certificate is required to own shotgun ammunition, but one is required to buy it. There is no restriction on the amount of shotgun ammunition that can be bought or owned.
 
 
 
However, shotgun ammunition which contains fewer than 6 projectiles requires the appropriate Firearms Certificate (FAC). Shotguns with a magazine capacity greater than 2 also require the appropriate Firearms Certificate to own. An FAC costs £50 but is much more restrictive than an SGC. A new 'variation' is required for each new caliber of gun to be owned, limits are set on how much ammunition a person can own at any one time, and an FAC can be denied if the applicant does not have sufficient 'good reason'. 'Good reason' generally means hunting, collecting or target shooting - though other reasons may be acceptable.
 
 
 
In the United States, federal law prohibits shotguns from being capable of holding more than three shells including the round in the chamber when used for hunting migratory waterfowl such as ducks and geese. For other uses, a capacity of any number of shells is generally permitted.  Most magazine-fed shotguns come with a removable magazine plug to limit capacity to 2, plus one in the chamber, for hunting migratory waterfowl.  Certain states have restrictions on magazine capacity or design features under hunting or [[assault weapon]] laws.
 
 
 
Shotguns intended for defensive use are as short as 18 inches (457 mm) for private use (the minimum shotgun barrel length allowed by law in the United States without special permits). Barrel lengths of less than 18 inches (457 mm) as measured from the breechface to the muzzle when the weapon is in battery with its action closed and ready to fire, or have an overall length of less than 26 inches (660 mm) are classified as short barreled shotguns (AKA "[[sawed-off shotgun]]s") under the 1934 [[National Firearms Act]] and are heavily regulated.
 
 
 
Shotguns used by military, police, and other government agencies are exempted from regulation under the [[National Firearms Act|National Firearms Act of 1934]], and often have barrels as short as 12 to 14 inches (305 to 356 mm), so that they are easier to handle in confined spaces. Non-prohibited private citizens may own short-barreled shotguns by purchasing a $200 tax stamp from the Federal government and passing an extensive background check (state and local laws may be more restrictive). Defensive shotguns will often have no [[stock (firearm)|buttstock]] or will have a folding [[stock (firearm)|stock]] to reduce overall length even more when required.
 
 
 
According to US law, a shotgun can be any weapon which fires a shotgun shell. This is because the first shotgun was little more than a pipe and a smaller tube filled with lead balls with gunpower mixed in.
 
 
 
Within [[Australia]], all shotguns manufactured after January 1, 1901 are considered firearms and are subject to registration and licensing. For more information see [[Gun politics in Australia]].
 
 
 
==References==
 
 
 
<references />
 
* {{cite book
 
| author = Jack O'Connor
 
| title = The Shotgun Book
 
| location= New York | publisher=Alfred A. Knopf
 
| year = 1949, 1965
 
| id = ISBN 0-394-50138-1}}
 
* {{cite book
 
| author = Elmer Keith
 
| title = Shotguns
 
| location= Pennsylvania | publisher=The Stackpole Company
 
| year = 1950
 
| id = ISBN 0-935632-58-1 }}
 
* {{cite book | author = Bob Brister
 
| title = Shotgunning, The Art and the Science
 
| location= New Jersey | publisher=New Win Publishing
 
| year = 1976
 
| id = ISBN 0-8329-1840-7}}
 
* {{cite book
 
| author = Michael McIntosh
 
| title = Best Guns
 
| location= Alabama | publisher=Countrysport Press
 
| year = 1999
 
| id = ISBN 0-924357-79-7}}
 
* {{cite journal
 
| author = Bruce N. Canfield
 
| year = 2004
 
| month = May
 
| title = Give Us More Shotguns!
 
| journal = American Rifleman }}
 
*[http://www.mcnews.info/marines/2005/20052ND/Divisions/Scuttlebutt1.shtml Marines Magazine] article on the experimental Frag-12 high explosive shotgun round.
 
*[http://www.mcwl.usmc.mil/factsheets/FRAG12%205%20Aug%2005.pdf Marine Corps Warfighting Laboratory spec sheet] on experimental Frag-12 round
 
 
 
==External links==
 
*[http://science.howstuffworks.com/shotgun.htm How Shotguns Work]
 
*[http://www.hrwscothunt.ndtilda.co.uk/info/data.htm Choke and pattern size]
 
*[http://www.recguns.com/Sources/OutIIIe.html Shotgun FAQ]
 
[[Category:Police weapons]]
 
 
[[Category:Sports and leisure]]
 
[[Category:Sports and leisure]]
  
 
{{credit|139786375}}
 
{{credit|139786375}}

Latest revision as of 14:26, 27 January 2023


Shotguns: a pump-action Remington 870 and two semi-automatic Remington 1100s, with 20 boxes of shells, a trap device, and three boxes of clay pigeons.

A shotgun is a firearm, usually with a smooth bore (as opposed to a rifled bore), and designed to fire a charge of spherical pellets, usually called a "shot." A shotgun usually has a buttstock and is carried and fired by one person. Waterfowl and other birds are nearly always hunted using shotguns, so a shotgun has sometimes been called a fowling piece. It is also called a scattergun because the charge of pellets fired from its barrel forms a pattern that spreads out, or scatters, into an ever-enlarging circle the farther it moves from the muzzle of the firearm.

A shotgun is normally a short-range firearm, effective typically at a distance of 40 yards (36 meters) or less, depending on the size of the shot: The smaller the shot, the more quickly it sheds its velocity and energy. At very short range, however, a shotgun is the deadliest of shoulder-fired guns and is much deadlier than a handgun, especially against humans and small animals.

According to U.S. law, a shotgun is defined as any weapon which fires a shotgun shell. This is because the first shotgun was little more than a pipe and a smaller tube filled with lead balls, with gunpowder mixed in.

Common uses

Some shotguns, top to bottom: Remington 870 pump gun in 12 gauge, Browning Citori over under in 12 gauge; Baikal (Russian) over under in .410

Although there are important military, police, and personal-defense uses for shotguns, by far the most wide use for them today is in hunting small game—waterfowl, upland birds, rabbits, squirrel, and some other small animals—in addition to a number of "shotgun sports," especially trap shooting, skeet shooting, and sporting clays shooting. Both skeet and trap competitions are featured at the Olympic Games.

Today, shotguns, loaded with buckshot or slugs, are increasingly used in deer hunting, and are required in some areas, depending on local hunting regulations. Many modern smoothbore shotguns using rifled slugs are quite accurate out to 75 yards (70 m) or more. Shotguns fitted with special rifled barrels specifically made for shooting slugs are typically accurate to 100 yards (90 m) and beyond.

In the U.S., law enforcement agencies often use shotguns, and they have some military uses too. The shotgun is also commonly used for home defense in the United States. It has excellent stopping power, is easier to aim than a handgun, and has an intimidating reputation for deadliness. When loaded with smaller shot, it will not penetrate walls as readily as slugs or handgun or rifle bullets, making it safer for non-combatants when fired in or around populated structures.

Types of shotguns

Today there are six types of shotguns: The single shot type and five kinds of repeaters. With the single shot or non-repeater, only one shell can be loaded in the gun and it has to be reloaded before it can be fired again. Single shot shotguns are usually break-open designs, meaning that the barrel swings, on a hinge, away from the breech for loading and unloading. Single shot shotguns are often the least expensive, costing under US$100, and they frequently have an exposed hammer, meaning that the hammer needs to be manually cocked (pulled back into firing position) before the gun can be fired. There are, however, expensive single shot shotguns, costing about US$1000 or more, designed expressly for trap shooting.

In addition, there are five types of repeater, or multiple-shot, shotguns, meaning that at least two shells can be loaded in the gun at a time, and thus at least two shots can be fired before the gun needs to be reloaded.

The first and earliest repeater is the double barrel. This too is a break-open design. In a double barrel shotgun there are two barrels built together next to one another on the same shotgun frame, and each barrel is loaded with a shell. After the first is fired, the second can be fired either by pulling the trigger a second time (on single trigger guns) or by pulling the second trigger (on double trigger guns).

Over under shotgun (a Browning Citori) broken open, showing some inner parts

There are two types of double barrel shotguns: The side by side if the two barrels are next to each other horizontally, or the over under if the two barrels are mounted one over the other vertically. The side by side is the older design. Early side by side double barrel shotguns had exposed hammers that had to be manually cocked before firing, but today's guns use a hammerless design. Both side by side and over under shotguns are used frequently for hunting. Skeet shooting and other shotgun sports, however, are far more often shot with over under shotguns than with side by side ones. Modern innovations such as interchangeable chokes, subgauge inserts, and interchangeable barrels make the the over under shotgun the shotgun of choice in skeet, trap shooting, and sporting clays. Double barrel shotguns of either type are usually the most expensive shotguns, with good ones starting at about US$1200 and going as high as US$100,000.

The second type of repeater is the pump action (also known as a slide action or, sometimes, a trombone action) gun. In this shotgun, several shells can be loaded at a time into a magazine built into the gun, and the action is operated by hand-pulling the forestock back and then forward. This ejects the spent shell and puts a fresh shell from the magazine into the chamber so that the gun can be fired again by pulling the trigger. Slide action shotguns are used widely in hunting, and sometimes for shotgun sports. Pump action shotguns are among the least expensive repeaters, starting for as little as US$225 for the simplest ones.

The third type of repeater is the autoloader—sometimes mistakenly called an "automatic." However, a true automatic is a machine gun, in which the gun continues firing as long as the trigger is held and there is fresh ammunition being fed into the gun. In an autoloader, the gun mechanism uses either the gas from the firing (known as gas operated) or the recoil from the firing (recoil operated) to work the mechanism, ejecting the spent shell and loading a fresh one from the magazine into the chamber, readying the gun for firing again when the trigger is pulled again. Autoloaders are widely used for both hunting and shotgun sports. Autoloading shotguns usually start at about US$550; some may be even less expensive.

A fourth type of repeater is the lever action shotgun. This shotgun looks and works like the lever operated Winchester rifles often seen in Western movies. Today this shotgun type is quite rare, and is never seen in organized matches in the shotgun sports. If found, such a shotgun would likely sell for about US$500 or more.

The fifth type of repeater is the bolt action shotgun. This type of shotgun has a bolt handle. After the first shot, the bolt is manually turned open and pulled back, ejecting the spent shell, and then shoved forward, picking up and chambering a fresh shell, and closed again. Most shotguns of this type were relatively inexpensive, "plain Jane" guns, costing about US$150. Today bolt action shotguns are rare, but less so than lever action shotguns. This type never appears in organized matches of any of the shotgun sports.

Specialized shotguns

Specialized police and defensive shotguns are called Riot shotguns or Riot guns. The introduction of rubber bullets and bean bag rounds ended the practice of using shot for the most part, but riot shotguns are still used to fire a variety of less than lethal rounds for riot control.

A sawed-off shotgun is one whose barrel has been shortened, leaving it more maneuverable, easier to use at short range and more readily concealed. Most countries have legal minimum lengths for shotgun barrels.

Coach Guns, usually of side by side double barrel design, are similar to sawed-off shotguns, except they are manufactured with an 18" barrel and are legal for civilian ownership in some jurisdictions. Coach guns are also commonly associated with the American Old West.

A backpacker shotgun has a short barrel (often less than 15" barrel length) and either a full-size stock or pistol grip, depending on legislation in intended markets. These weapons are typically break-action .410, single-barrel designs with no magazine and no automatic ejection capability. Backpacker shotguns are popular as survival weapons. Other examples include a variety of shotgun barrel (usually a .410) over a rifle barrel combinations, marketed as a "survival" device. Generally, there is one manually-cocked external hammer and an external selection lever to select which caliber of cartridge to fire.

Shotgun/rifle combination guns with three or even four barrels, commonly known as drillings, are available from a number of European makers—they are almost unknown in America. These provided flexibility, enabling the hunter to effectively shoot at flushing birds or more distant mammals while carrying only one gun.

Shotgun shooting

In either hunting or shotgun sports, shotguns are usually used to shoot moving targets. This means that the shooter needs to learn to swing or move the shotgun with the motion of the moving target during the shooting, lead the target, meaning shoot ahead of the target so that the shot and the target meet together at the same time, and follow through the shot, meaning to keep the gun moving properly during the shooting sequence and not stop the swing at the time of shooting. Good shotgun shooting typically takes a great deal of practice and a large amount of shooting so that the shooter learns how much to lead the target, how to swing or move the shotgun properly, and how to follow through on the shot. Different orientations of target and target motion in relationship to the shooter—whether an animal in a hunting situation, or clay "bird" in a shooting sport—each require different hold, swings, leads, and follow through.

Today the very best shooters in skeet are able to hit 100 or even 400 straight targets, meaning they can hit 100 targets without missing one, or shoot 100 targets with each of four shotgun sizes—12, 20, and 28 gauges and .410 bore—without missing one.

Shotguns for defensive purposes

Aside from the most common use against small, fast moving targets, the shotgun has several advantages when used against still targets. First, it has enormous stopping power at short range, more than all handguns and comparable to large rifle cartridges. The wide spread of shot produced by the gun makes it easier to aim and to be used by inexperienced marksmen. A typical self-defense load of buckshot contains 8-27 large lead pellets, resulting in many wound tracks in the target. Also, unlike a rifle bullet, each pellet of shot is less likely to penetrate walls and hit bystanders. Shotguns are favored by police for their low penetration and high stopping power, while many American households use shotguns as a home defense weapon for those reasons.

The typical home defense shot is seldom over ten or fifteen feet. At these relatively short ranges, the shot charge never expands to more than a few inches. At extremely close ranges, the pellets and wad will strike the target as a single mass.

History

The first recorded use of the term shotgun was in 1776, in Kentucky, as part of the "frontier language of the West" by James Fenimore Cooper. With the adoption of guns of smaller bores with rifled barrels, especially the Pennsylvania rifle about 1725 and later, the shotgun, as a smoothbore gun intended to fire a charge of shot instead of a single bullet, began to emerge as a separate entity about the beginning of the nineteenth century. The side by side double-barreled shotgun has changed little since about 1875.

Confederate solider with shotgun.

Cavalry units on both sides of the American Civil War used black powder muzzle-loading shotguns. American cavalry used the shotgun extensively during the Indian Wars throughout the latter half of the nineteenth century. Shotguns were also favored by citizen militias and similar groups. Shotguns were used in the defense of The Alamo during Texas' War of Independence with Mexico.

Except for cavalry units, the shotgun saw less and less military use throughout the nineteenth century. It remained popular with guards and lawmen, however, and the shotgun became one of many symbols of the American Old West. The famous lawman, Cody Lyons, killed two men with a shotgun; his friend Doc Holliday's only confirmed kill was with a shotgun.

Both these men used the short-barreled coach gun shotgun, favored by private strongbox guards on stages and trains. These guards rode the coach sitting next to the driver, with the weapon loaded with buckshot for defense against bandits. Passenger carriages carrying a strongbox usually had at least one such private guard armed with a shotgun. This has survived in American slang; the term "riding shotgun" is used for the passenger who sits in the front passenger seat.

Daniel Myron LeFever

Daniel Myron LeFever is credited with the invention of the hammerless shotgun in 1878, while working for Barber & LeFever in Syracuse, N.Y. This gun was cocked with external cocking levers on the side of the breech. He formed his own company, The LeFever Arms Co., in 1880, and went on to patent the first truly automatic hammerless shotgun in 1883. This gun automatically cocked itself when the breech was closed. He also invented automatic ejectors, to throw out the empty case after firing.

John Moses Browning

Famed gun designer John Browning made numerous shotgun innovations and revolutionized shotgun design while working for Winchester Firearms. In 1887, Browning introduced the Winchester Model 1887 Lever Action Repeating Shotgun, which loaded a fresh cartridge from its internal magazine by the operation of the action lever. Before this time, most shotguns were the break open type.

That was overshadowed by two further Browning innovations at the end of the nineteenth century. In 1893, he produced the Model 1893 Pump Action Shotgun, introducing that now familiar shotgun type to the market. Then in 1900, he patented the Browning Auto-5, the world's first semi-automatic shotgun; it remained in production until 1998.

World Wars

In World War I, some American forces under General Pershing used 12-gauge pump action shotguns on the Western front in 1917. These shotguns were fitted with bayonets and became known as trench guns. Those without such modifications were known as riot guns. After World War I, the United States military began referring to all shotguns as riot guns.

Due to the cramped conditions of trench warfare, the American shotguns were extremely effective. Germany even filed an official diplomatic protest against their use, alleging they violated the laws of warfare. The Judge Advocate General reviewed the protest, and it was rejected because the Germans protested use of lead shot (which would have been illegal) but military shot was plated with copper covering the lead. This is the only occasion when the legality of the shotgun's use in warfare has been questioned.

During World War II, shotguns were not heavily used by military forces in Europe, but were a favorite weapon of Allied-supported partisans, such as the French Resistance. In the Pacific theater, however, thick jungles and heavily-fortified positions made the shotgun a favorite weapon of the United States Marines, who tended to use pump shotguns, since the pump action was less likely to jam in those humid and dirty wartime conditions. Similarly, the United States Navy used pump shotguns to guard ships when in port in Chinese harbors (for example, Shanghai) and the United States Army Air Forces used pump shotguns to guard bombers and other aircraft against saboteurs when parked on airbases across the Pacific and on the West Coast of the United States.

Late twentieth century to present

Since the end of World War II, the shotgun has remained a specialty military weapon, deployed only with its advantages warranted its use. It was used to defend machine gun emplacements during the Korean War, and American and French jungle patrols used shotguns during the Vietnam War. Many modern navies make extensive use of shotguns by personnel engaged in boarding hostile ships, as any shots fired will almost certainly be over a short range.

The shotgun has become a standard in American law enforcement use, being standard equipment in most United States police patrol cars. Most police officers are trained in their use. A variety of specialty less-lethal or non-lethal ammunition, such as tear gas shells, bean bags, flares, explosive sonic stun rounds, and rubber projectiles, all packaged into 12 gauge shotgun shells, are produced specifically for the law enforcement market.

Today, shotguns are ubiquitous in hunting use throughout the world for all sorts of game. The versatility of the shotgun as a hunting weapon has steadily increased, as slug rounds and more advanced rifled barrels have given shotguns longer range and killing power.

Shotguns are not the preferred weapons for criminal activity, since criminals like weapons which are more easily concealed, such as handguns. But the comparatively easy availability of double-barreled shotguns compared to pistols in the United Kingdom and Australia, coupled with the ease with which their barrels and stocks can be unlawfully shortened, has made the sawed-off shotgun a popular weapon of armed robbers in these countries.

Shotgun gauges

Shotgun sizes are usually expressed in terms of gauge. Gauge was originally determined by the number of perfectly round lead balls of equal size required to make a pound. Thus, if 12 round lead balls made a pound, the diameter of those balls equaled the diameter of a 12 gauge shotgun, and if it took 20 balls to make a pound, the diameter of one of those was the diameter of a 20 gauge shotgun.

The one exception to "gauge" as the term of shotgun bore size is the .410 shotgun; this designation, .410 of an inch, is the actual bore size of this shotgun.

Today shotgun bore sizes are standardized:

  • 10 gauge = 0.775 inch
  • 12 gauge = 0.729 inch
  • 16 gauge = 0.662 inch
  • 20 gauge = 0.615 inch
  • 28 gauge = 0.550 inch
  • .410 bore = 0.410 inch

The 12 gauge is by far most common, followed by the 20 gauge. Ten gauge is sometimes used for large waterfowl hunting. In the past, the 16 gauge was very common and preferred by many shotgun shooters, but it is less commonly used today, and ammunition for it is also harder to find than 12 or 20 gauge.

In the past there were additional gauges, such as 4, 8, 14, 24, and 32 gauges. Those are now obsolete, and ammunition for them is usually unavailable.

Today American skeet shooting uses 12, 20, and 28 gauges, and the .410. All those are also used for hunting. The .410 is often thought of as a good beginning gun for young shooters because of its mild recoil, but it is really something of an expert's gun because the shot charge from it is small, leading to more misses. The 28 gauge was originally made for skeet shooting. It is rare in hunting use, but is seen commonly on skeet ranges.

Shotgun ammunition

Ammunition for shotguns is usually called a shotgun shell, or shot shell, or simply shell. The term cartridge is used for rifle ammunition, but not for shotgun shells.

Parts of a shotgun shell: primer, hull, powder, wad, and shot

A shotgun shell consists of five parts:

  • The outer shell, or hull, or case, with its (usually) brass or steel base; the outer shell today is usually made of plastic, although thick cardboard-like paper was used in the past and some paper shot shells are still made
  • The primer, which is a small percussion cap set in a hole in the center of the base of the shell; this primer is struck by the firing pin of the shotgun when fired and ignites the gunpowder
  • The gunpowder itself; this is placed inside the shell case at the bottom, just above the primer
  • A wad, or wads, between the powder and the shot; today, wads are usually made of plastic and are one-piece; in the past wads were often of paper or cardboard or kapok or similar material and there were numerous such pieces, often of different materials and somewhat different shape, within a single shot shell
  • The shot itself, resting atop the wad and just under the mouth of the shell

Today's plastic shot shells have a crimped mouth, but paper shot shells usually had a top wad over the shot with a rolled crimp on the mouth of the shell body, holding the top wad in place. Slugs have the front of the slug visible; it is held in place in the loaded shell with a rolled crimp even if the body of the shell is made of plastic.

12, 20, and 28 gauge, and .410 shotgun shells, along with a decal awarded for shooting 25 straight in skeet or trap shooting.

Shotgun shells are loaded to different lengths. The most common length, except for 10 gauge and .410 bore, is 2 ¾ inches, but some, especially for 20, 12, and 10 gauges are longer, and .410 loads are either 3 inches or 2 ½ inches long—these lengths are the length of the hull or case after the shell is fired. The length of load that can be used depends on the chamber of the shotgun in which the load is to be fired—the chamber must be at least as long as the longest load to be used. Different shotgun loads contain different amounts and/or sizes or types of shot, and are loaded to achieve somewhat different muzzle velocities.

Most shotguns loads contain ball shot, usually known as pellets. In the past, the pellets were almost always made of lead. But non-toxic loads are required by Federal law in the United States for waterfowl hunting, so lead pellets in shotgun loads have been partially replaced by bismuth, steel, tungsten-iron, tungsten-nickel-iron, or other substances—such non-lead shot is required for waterfowl shooting, and usually permissible elsewhere. Lead shot is still most commonly used for non-waterfowl hunting and for shotgun sports.

The amount of powder in shot shells is often expressed as drams equivalent, a throwback to black powder days, when powder was measured in drams. Today's smokeless powders produce very much more energy per unit of powder than was produced by black powder, so an amount of smokeless powder is used that will produce a velocity equivalent to the given number of drams of black powder. A better designation than "drams equivalent" is to express the power of the load in terms of muzzle velocity that the load achieves, and that is increasingly being done by shot shell manufacturers.

Nearly all shotgun ammunition containing birdshot or buckshot is loaded to achieve velocities between about 1100 feet per second (FPS) and about 1400 FPS. Slugs are usually loaded to achieve velocities of about 1500 FPS to about 1875 FPS.

Points to consider when choosing shot shell loads are: (1) gauge—it is highly dangerous to attempt to use a shell of the inappropriate gauge in any shotgun, (2) shot type (for example, lead or non-lead, and if non-lead then what kind of non-lead), (3) shot size, (4) shot amount (usually expressed in ounces), (5) velocity or power of the load, and (6) length of the load. Those considerations will be decided on the basis of the intended use of the shot shells. Some shot shells are designed and designated to be used in target and shotgun sports shooting, others are designed and designated for particular kinds of hunting, and some loads are designed to be multi-purpose.

Since the "kick" or recoil of the shotgun against the shooter's shoulder is proportional to the energy of the load, and energy increases with the mass of the projectile and the square of its velocity (e = ½ m v 2), loads with more shot and/or especially higher velocity kick more. Most target loads are loaded light because high power is not needed for this purpose, and a target shooter will often shoot 25 to 100 or more rounds within the short time of an hour or so, and the constant recoil becomes very tiring.

Shot is often termed either birdshot or buckshot, depending on the shot size. Birdshot pellets have a diameter smaller than 0.20 inches (5 mm) and buckshot is larger than that. Pellet size is indicated by a number, for bird shot this ranges from the smallest #12 (0.05 in) to #2 (0.15 in) and then BB (0.18 in). For buckshot, the numbers usually start at 4 (0.24 in) and go down to 1, 0, 00, 000, and finally 0000 (.38 in). Trap, skeet, and sporting clays shooting use shot of #7½ or smaller. Large bird and waterfowl hunters usually use shot of #6 or larger.

Buckshot is usually used for larger game hunting, such as deer. Buckshot is legal or even legally required for this use in some jurisdictions, but banned in others. In addition, there are shotgun loads that contain a single shaped lead projectile, called a shotgun slug, or just a slug.

Bird shot pellets are small enough that they can be measured into the cartridge by weight, and just poured in, whereas buckshot pellets are so large they won't all fit unless they're stacked inside the cartridge one by one in a certain particular geometric arrangement.

Table of Birdshot Size
Size Diameter Pellets/oz Lead Pellets/oz Steel
BBB .190" (4.83 mm) 62
BB .180" (4.57 mm) 50 72
1 .160" (4.06 mm) 103
2 .150" (3.81 mm) 87 125
3 .140" (3.56 mm) 158
4 .130" (3.30 mm) 135 192
5 .120" (3.05 mm) 170 243
6 .110" (2.79 mm) 225 315
7 1/2 .100" (2.41 mm) 350
8 .090" (2.29 mm) 410
9 .080" (2.03 mm) 585
Table of Buckshot Size
Size Diameter Pellets/oz
000 or LG ("triple-aught") .36" (9.1 mm) 6
00 ("double-aught") .33" (8.4 mm) 8
0 or SG("one-aught") .32" (8.1 mm) 9
SSG .31" (8.0 mm) 12
1 .30" (7.6 mm) 10
2 .27" (6.9 mm) 15
3 .25" (6.4 mm) 18
4 .24" (6.0 mm) 21

Pattern and choke

As the shot leaves the barrel it begins to disperse in the air. The resulting cloud of pellets is known as the shot pattern; this pattern spreads out into an ever-widening circle as it travels away from the muzzle of the shotgun. Patterns are usually measured by firing at a 30 inch (76cm) diameter circle on a larger sheet of paper placed at varying distances. The hits inside the circle are counted, and compared to the total number of pellets, and the density of the pattern inside the circle is examined. An "ideal" pattern would have no voids; any region where a target silhouette will fit and not cover 3 or more holes is considered a potential problem.

A constriction in the end of the barrel known as the choke is used to tailor the pattern for different purposes. Chokes may either be formed as part of the barrel at the time of manufacture, by squeezing the end of the bore down over a mandrel, or by threading the barrel and screwing in an interchangeable choke tube. The choke usually tapers smoothly from the bore diameter down to the choke diameter. The use of interchangeable chokes has made it easy to tune the performance of a given combination of shotgun and shot shell to achieve the desired performance.

The choke should be tailored to the range and size of the targets. The use of too much choke and a small pattern increases the difficulty of hitting the target; the use of too little choke produces large patterns with insufficient pellet density to reliably break targets or kill game. "Cylinder barrels" have no constriction.

Table of shotgun chokes
for a 12 gauge shotgun using lead shot
Constriction
(inches)
Constriction
(micrometres)
American Name percentage of shot
in a 30 in (76 cm) circle
at 40 yd (37 m)
Total spread at 40 yds
(in)
Total spread at 37 m
(cm)
Effective range
(yd)
Effective range
(m)
0.000 0 Cylinder 40 59 150 20 18
0.005 127 Skeet 45 52 132 23 21
0.010 254 Improved Cylinder 50 49 124 25 23
0.015 381 Light Modified          
0.020 508 Modified 60 46 117 35 32
0.025 635 Improved Modified          
0.030 762 Light Full   43 109    
0.035 889 Full 70     40 37
0.045 1143 Extra Full          
0.050 1270 Super Full          

Barrel length

Shotguns generally have longer barrels than rifles, but the long shotgun barrel is not for ballistic purposes; shotgun shells use small powder charges in large diameter bores, and this leads to very low muzzle pressures, and very little velocity change with increasing barrel length. Modern powder in a shotgun burns completely in 10-14-inch barrels.

Shotguns made for close ranges, where the angular speed of the targets is great (such as upland bird hunting) tend to have shorter barrels, around 26 to 28 inches (660 to 710 mm). Shotguns for longer range shooting, where angular speeds are less (trap shooting, pheasant, and waterfowl hunting) tend to have longer barrels, 28 to 34 inches. The longer barrels have more inertia, and will therefore swing slower but steadier. The short, low inertia barrels swing faster, but are less steady.

Shotgun slugs

A shotgun slug is a single heavy projectile, and shotgun slugs often have finned rifling designed to spin the bullet and stabilize it in order to improve its accuracy. Some shotguns are fitted with rifled barrels (these barrels are usually interchangeable with a smoothbore barrel on the same gun) that are designed to be used with a special type of shotgun slug that is encased in a plastic ring holder (sabot) designed to peel away after it exits the barrel, leaving the slug now spinning (and thus stabilized) after passing through the rifled barrel. These shotguns, although they have rifled barrels, still use a shotgun-style shell instead of a rifle cartridge and may in fact still fire regular multipellet shotgun shells, but the rifling in the barrel will affect the shot pattern.

References
ISBN links support NWE through referral fees

External links

All links retrieved January 27, 2023.

Credits

New World Encyclopedia writers and editors rewrote and completed the Wikipedia article in accordance with New World Encyclopedia standards. This article abides by terms of the Creative Commons CC-by-sa 3.0 License (CC-by-sa), which may be used and disseminated with proper attribution. Credit is due under the terms of this license that can reference both the New World Encyclopedia contributors and the selfless volunteer contributors of the Wikimedia Foundation. To cite this article click here for a list of acceptable citing formats.The history of earlier contributions by wikipedians is accessible to researchers here:

The history of this article since it was imported to New World Encyclopedia:

Note: Some restrictions may apply to use of individual images which are separately licensed.