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Components of a modern bottleneck rifle cartridge. Top-to-bottom: Copper-jacketed bullet, smokeless powder granules, rimless brass case, Boxer primer.. Handloading, or reloading, is the practice of making firearm cartridges by manually assembling the individual components (metallic/polymer case, primer, propellant and projectile), rather than purchasing mass-assembled, factory-loaded ...
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While shotguns had been used in earlier conflicts, the trench warfare of World War I demonstrated a need for standardized weapons and ammunition. [2] Initial issue with each shotgun was one hundred commercial-production paper-cased shotgun shells containing nine 00 buckshot pellets 0.33 inches (8.4 mm) in diameter.
The DP-12 is a bullpup 12-gauge pump action double-barreled shotgun designed by Standard Manufacturing.It has two tube magazines, each of which feeds its own barrel.Each magazine tube can hold up to seven 2.75-inch (70 mm) 12-gauge shotshells or six 3-inch (76 mm) shotgun shells; [1] 16 (2 + 3 ⁄ 4") or 14 (3") in total with indicator windows.
[2] The Model 11-87 incorporates a self-compensating gas system design, which allows the gun to operate with a range of loads, from light 2 + 3 ⁄ 4-inch (7.0 cm) shells to 3-inch (7.6 cm) Magnum shells, without any adjustment by the operator. It is manufactured in 12 gauge and 20 gauge; both will cycle 2 + 3 ⁄ 4-inch and 3-inch shells.
This led to the development of a shorter 60mm (2.36 in) shotshell, instead of the longer and more common 70mm (2.75) shotshell, with both the desired power and size. The use of the MAG-7 with these cartridges yields an effective range of 45 yards (41.1 m), although they have a proven lethality to 90 yards (82 m). [ 4 ]
The Remington Model SP-10 is a gas-operated semi-automatic shotgun chambered for 10 gauge 3 + 1 ⁄ 2-inch (8.9 cm) Magnum shells. It was produced by Remington Arms from 1989 to 2010. [ 3 ] The design was based on the Ithaca Mag-10 .
The Ithaca Mag-10 was the world’s first 10 GA semi-automatic gas-operated shotgun chambered in 10-gauge (3½"). The CounterCoil system built into the front of the magazine tube reduced the recoil from the round to allow easier second shots but cut the magazine size in half to 2 shells.