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This created a cartridge case stronger than the .45 Winchester Magnum cartridge case. The .40 Super cartridge case was designed for a balance of strength and powder capacity. To maximize bullet pull and overall feeding characteristics, the case has a neck length of .175 in. The shoulder angle is an optimum 25 degrees.
The first references to the possible use of polymers in the manufacture of casings come from the early 1950s. One of the earliest is the patent filed by Jack W. Roske in 1950 [1] and the idea was to use a metal cup joined with a polymer shell "that will be converted to gas during the firing phase to assist in propelling the projectile and thereby permit reduction in the use of the propelling ...
The main reason for the development of new cases was due to the semi-rimmed .38 Super case not always feeding reliably from the double-stack box magazines used in several semi-automatic pistols popular with practical shooting sports, such as United States Practical Shooting Association (USPSA) or International Practical Shooting Confederation ...
It was also used in the Yugoslavian Zastava M57 pistol, and the Czech ČZ vz. 52, which was the standard Czech service pistol from 1952 until 1982. In addition, the cartridge was used in numerous submachine guns, including the Soviet PPD-40, PPSh-41, and PPS-43, the Russian PP-19 Bizon, the East German WG66, the Czech Sa 24 and Sa 26. Norinco ...
Smith & Wesson then decided the 10mm Auto was too much cartridge for the reduced power loading, and that the .45 ACP sized guns that chambered it were too heavy and bulky; out of this came the .40 S&W, a shortened 10mm Auto case, designed to fit in a 9mm-sized gun, with a reduced pressure loading that allowed a lighter, easier to shoot gun.
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