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A 12-gauge shotgun cartridge in a transparent plastic hull, allowing the contents to be seen. From left to right: brass, propellant, over-powder wad, shot wad, #8 birdshot, over-shot wad, and crimp. A shotgun cartridge, shotshell, or shell is a type of rimmed, cylindrical (straight-walled) ammunition used specifically in shotguns.
Initial production for the Vietnam War loaded 00 buckshot into the same red plastic cases being used for sporting ammunition and was designated: Shell, shotgun, plastic case, 12 gauge, No. 00 buck, XM162. The shells were typically packaged as twelve ten-round cardboard boxes within a metal ammunition box. [1]
The diameter of the wad slug is slightly less than the nominal bore diameter, being around 0.690 in (17.5 mm) for a 12-gauge wad slug, and a wad slug is generally cast solely from pure lead, necessary for increasing safety if the slug is ever fired through a choked shotgun.
A series of individual 1/1,000,000-second exposures showing shotgun firing shots and wadding separation. In shotgun shells, the wadding is actually a semi-flexible cup-shaped sabot designed to hold numerous much smaller-diameter sub-projectiles (i.e. shots), and is launched out together as one payload-carrying projectile.
In metallic cartridges, peak pressure can vary based on propellant used, primers used, charge weight, projectile type, projectile seating depth, neck tension, chamber throat/lead parameters. In shotshells, the primary factors are charge weight, projectile weight, wad type, hull construction, and crimp quality.
For example, the barrel of a 12-gauge shotgun is equal to the diameter of a 1/12 of a pound lead ball (0.729 in) and a 20-gauge can fit a 1/20 pound lead ball (0.615 in). Using this method, a .410 bore is equivalent to a (hypothetical) 67-gauge, instead of the incorrectly labeled 36 gauge (0.506) in Europe and South America. [14] [15]
During the Vietnam War the United States employed 12-gauge combat shotguns using flechette loads. [ 8 ] [ 9 ] These plastic-cased shells were issued on a limited trial basis during the Vietnam War. Cartridges manufactured by the Western Cartridge Company contained 20 flechettes, each 18.5 mm (0.73 in) long and weighing 7.3 gr (0.47 g); Federal ...
A US Marine practices shotgun door-breaching techniques. A breaching round or slug-shot is a shotgun shell specially made for door breaching.It is typically fired at a range of 6 inches (15 cm) or less, aimed at the hinges or the area between the doorknob and lock and doorjamb, and is designed to destroy the object it hits and then disperse into a relatively harmless powder.
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