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The first 56 is the diameter of the case at the base .56 inches (14.2 mm), measured just past the rim, and the second 56 is the diameter at the case mouth, also 0.56 in (14 mm). Later versions of the cartridge included the .56-52, .56-50, [ 2 ] and .56-46, which had varying degrees of taper in the cases, to accommodate smaller diameter bullets.
Toggle the table of contents. ... .56-46 Spencer.56-50 Spencer.56-52 Spencer ... 4.5×26mm MKR; 5 mm Remington Rimfire Magnum; 10.4×38mm Swiss Rimfire; 12.17×42mm ...
Cartridges were loaded with 45 grains (2.9 g) of black powder, and were also available as .56-52, .56-50, [15] and a wildcat .56-46, a necked down version of the original .56-56. Lugs indicates that the .50 calibre was the standard issue rifle, with a reduced diameter bullet to reduce the recoil and the risk of accidental magazine explosions. [15]
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).
A range table was a list of angles of elevation a particular artillery gun barrel needed to be set to, to strike a target at a particular distance with a projectile of a particular weight using a propellant cartridge of a particular weight.
For instance the same angle of 0.1 mrad will subtend 10 mm at 100 meters, 20 mm at 200 meters, etc., or similarly 0.39 inches at 100 m, 0.78 inches at 200 m, etc. Subtensions in mrad based optics are particularly useful together with target sizes and shooting distances in metric units. The most common scope adjustment increment in mrad based ...
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Toggle the table of contents ... (1,200 mm) Short version 40 in (1,000 mm) Barrel length: Long version: 30 in (760 mm) Short version 22 in (560 mm) Cartridge.56-50 ...