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The .40 S&W (10.2×22mm) is a rimless pistol cartridge developed jointly by American firearms manufacturers Smith & Wesson and Winchester in 1990. [3] The .40 S&W was developed as a law enforcement cartridge designed to duplicate performance of the Federal Bureau of Investigation's (FBI) reduced-velocity 10mm Auto cartridge which could be retrofitted into medium-frame (9 mm size) semi ...
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The final improvement came with the increased thickness of the cartridge case wall from the web area up to the beginning of the shoulder. 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.
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The Smith & Wesson Model 40 originally debuted as the Centennial in 1952 and was renamed the Model 40 in 1957. The Model 40 is chambered in .38 special and has a five-round capacity. It is a snub-nose revolver with a 1 7/8-inch barrel. It is built on Smith & Wesson's J-frame and weighs 21 oz. empty. [2]
The .40 S&W CAN duplicate this performance. The .41 AE uses 0.410-inch (10.4 mm) bullets, whereas the .40 S&W uses 0.400-inch (10.2 mm) bullets. However, as it lacks the backing of ammunition manufacturers in making .410 caliber bullets suited for semiautomatic pistols, the .41 AE has not achieved widespread popularity.
An old .38-40 Winchester sample. It is unclear why this cartridge was introduced, as it is very similar to the .44-40 from which it was derived. It has approximately 110 ft⋅lbf (150 J) less muzzle energy, and has a muzzle velocity about 110 ft/s (34 m/s) less than the .44-40.
Ballistics fall somewhere between the .40 S&W and the 10 mm Auto. [7] Unlike the 10 mm which operates at a SAAMI maximum of 37,500 psi , the .400 Corbon operates at 29,000 psi (although one source states that the pressure is 26,500 psi), [ 8 ] [ 9 ] much closer to the SAAMI maximum pressures for .45 ACP (21,000 psi), and .45 ACP +P (23,000 psi ...