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The 20-gauge shotgun is the next most popular size [citation needed], and is popular for upland game hunting. The next most popular sizes are the .410 bore and the 28 gauge. The least popular sizes are the 10 gauge and the 16 gauge; while far less common than the other four gauges, they are still commercially available. [citation needed] [9]
The 20-gauge shotgun, also known as 20 bore, is a type of smoothbore shotgun. 20-gauge shotguns have a bore diameter of .615 in (15.6 mm), while the 12-gauge has a bore diameter of .729 in (18.5 mm). [ 2 ] 12-gauge and 20-gauge shotguns are the most popular gauges in the United States .
Conversions for rifles and carbines of larger caliber, such as the AK-47 or Thompson submachine gun include a rifled insert barrel extending beyond the length of the chamber. [ 9 ] [ 10 ] One exception to the use of a special lightweight bolt was the Colt Service Ace , offered as a complete pistol or as a conversion kit for the M1911.
This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name. Data values are the highest found for the cartridge, and might not occur in the same load (e.g. the highest muzzle energy might not be in the same load as the highest muzzle velocity, since the bullet weights can differ between loads).
Gauge: The gauge of a firearm is a unit of measurement used to express the diameter of the barrel. The M60, a general purpose machine gun. General purpose machine gun: A machine gun intended to fill the role of either a light machine gun or medium machine gun, while at the same time being man-portable.
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The Model 1000 was available in 12-gauge and 20-gauge, with trap (1000T) and skeet (1000S) variants. Both gauges were offered with 2 + 3 ⁄ 4-inch (7.0 cm) chambers; the 12-gauge was also sold with a 3-inch (7.6 cm) chamber for magnum shotshells. [1] The Model 1000 was offered by Smith & Wesson from 1973 to 1985. [3]
The term caliber change in firearms refers to the process of permanently altering a firearm to allow it to fire a different cartridge than the one it previously fired. With a bolt action rifle, this is mostly done by reshaping the current chamber through machining it with a new reamer, or by replacing the barrel with a new barrel, which has a new cartridge chamber machined into it.