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20 mm caliber is a specific size of popular autocannon ammunition. The dividing line between smaller-caliber weapons, commonly called " guns ", from larger-caliber " cannons " (e.g. machine gun vs. autocannon ), is conventionally taken to be the 20 mm round, the smallest caliber of autocannon.
While artillery grain dimensions might be several inches or centimeters, the standard grains of military rifle propellant were 0.085 inches (2.2 mm) long and 0.03 inches (0.76 mm) in diameter. The Army identified this military rifle propellant as Pyro DG (for diphenylamine, graphited), and 500 tons per day were manufactured by various plants ...
A guide to the recoil from the cartridge, and an indicator of bullet penetration potential. The .30-06 Springfield (at 2.064 lbf-s) is considered the upper limit for tolerable recoil for inexperienced rifle shooters. [2] Chg: Propellant charge, in grains; Dia: Bullet diameter, in inches; BC: Ballistic coefficient, G1 model; L: Case length (mm)
Source(s): Hodgdon Online Reloading Data The .375 Winchester / 9.5x51mmR is a modernized version of the .38-55 Winchester , a black powder cartridge from 1884. It was introduced in 1978 along with the Winchester Model 94 “Big Bore” lever action rifle , which was in production from 1978 until 1986.
The .38-40 Winchester (10.17x33mmR) is actually a .40 caliber (10 mm) intermediate cartridge shooting .401 in (10.2 mm) caliber bullets. The cartridge was introduced by Winchester in 1874 and is derived from their .44-40 Winchester .
.224 Weatherby Magnum maximum C.I.P. cartridge dimensions. All sizes in millimeters (mm) plus Imperial (inches). The .224 Weatherby Magnum (5.56×49mmB) is a sporting cartridge that was developed in the 1940s by Roy Weatherby, and commercial ammunition was produced starting in 1963.
The .40-65 Winchester (also called the .40-65 Winchester and Marlin) [1] was an American rifle cartridge. Introduced in 1887 for the Winchester Model 1886 , and available in Winchester single shots and in the Marlin Model 1895 , it was "a further effort to put more steam" in repeating rifle cartridges. [ 2 ]
The .40-72 Winchester, also known as .40-72 WCF is a centerfire straight-walled rifle cartridge designed for black powder rather than smokeless powder. It was introduced in 1895 for the Winchester 1895 lever-action rifle.