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Boys died before the rifle was officially adopted, and it was named in his honor. The .55 Boys round was a modified .50 BMG round necked up to accept a larger, steel-cored bullet to increase armor penetration. [citation needed] A belt was added to reinforce the case due to the heavy propellant charge. [citation needed] [note 2]
The cartridge was designed as an improvement to the .50 BMG cartridge, a common machine gun and rifle cartridge. It is a wildcatted.50 BMG case, shortened to 3.27 inches (83 mm) from its original length of 3.91 inches (99 mm) and necked down to accept a .416 caliber, 398-grain (25.8 g) projectile; [3] [4] however, the case dimensions are ...
Magnum-action cartridges, are usually rifle cartridges that are both longer and more powerful than traditional full-powered rifle long-action cartridges, with a COL between 85 and 91 mm (3.34 and 3.6 in), including some of the long-action cartridges with a case head larger than 13 mm (.50 in) diameter, which is most commonly exemplified by the ...
The .50-90 Sharps is similar to the .50-100 Sharps and .50-110 Sharps cartridges. All three use the same 2.5-inch (64 mm) case, the latter two being loaded with more grains of black powder. All rifles made for the .50-90 Sharps should be able to use the .50-110 and .50-100 cartridges due to the case dimensions being nearly identical.
The Bushmaster BA50 is a bolt-action, magazine-fed rifle designed to shoot the .50 BMG cartridge. It has a 22- (carbine) or 30-inch, match grade Lothar Walther free-floating barrel with a 1-in-15-inch twist rate (standard for the .50 BMG cartridge). The rifle weighs 30 pounds (without a magazine or ammunition) and has a muzzle brake to help ...
ArmaLite updated the rifle to the AR50-A1B model, which featured a smoother action and a more heavily reinforced muzzle brake. The newer bolt stop could be depressed by hand to release the bolt. The AR50-A1B was designed for long-range shooting, primarily firing the .50 BMG round. ArmaLite manufactures the rifle in several configurations:
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The case body is very similar in dimensions to the .500 S&W Magnum revolver cartridge, being slightly longer and fully tapered for automatic feeding in the weapon. The round is intended to improve stopping power greatly at short- to medium-range as compared to the standard 5.56×45mm NATO round.