.40 S&W
The .40 S&W (10.2x22mm) is a rimless pistol cartridge developed jointly by American firearms manufacturers Smith & Wesson and Winchester in 1990. 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-automatic handguns. It uses 0.40-inch (10 mm) diameter bullets ranging in weight from 105 to 200 grains (6.8 to 13.0 g).
| .40 S&W | ||||||||||||||||||||||||
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.40 S&W FMJ flat-point cartridge | ||||||||||||||||||||||||
| Type | Pistol | |||||||||||||||||||||||
| Place of origin | United States | |||||||||||||||||||||||
| Production history | ||||||||||||||||||||||||
| Designer | Bob Klunk | |||||||||||||||||||||||
| Designed | January 17, 1990 | |||||||||||||||||||||||
| Produced | 1990–present | |||||||||||||||||||||||
| Specifications | ||||||||||||||||||||||||
| Parent case | 10mm Auto | |||||||||||||||||||||||
| Case type | Rimless, straight | |||||||||||||||||||||||
| Bullet diameter | .400 in (10.2 mm) | |||||||||||||||||||||||
| Land diameter | .390 in (9.9 mm) | |||||||||||||||||||||||
| Neck diameter | .423 in (10.7 mm) | |||||||||||||||||||||||
| Base diameter | .424 in (10.8 mm) | |||||||||||||||||||||||
| Rim diameter | .424 in (10.8 mm) | |||||||||||||||||||||||
| Rim thickness | .055 in (1.4 mm) | |||||||||||||||||||||||
| Case length | .850 in (21.6 mm) | |||||||||||||||||||||||
| Overall length | 1.135 in (28.8 mm) | |||||||||||||||||||||||
| Case capacity | 19.3 gr H2O (1.25 cm3) | |||||||||||||||||||||||
| Rifling twist | 1 in 16 in. (406 mm) | |||||||||||||||||||||||
| Primer type | Small pistol | |||||||||||||||||||||||
| Maximum pressure | 35,000 psi (240 MPa) | |||||||||||||||||||||||
| Ballistic performance | ||||||||||||||||||||||||
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| Test barrel length: 4 inches (100 mm) Source(s): | ||||||||||||||||||||||||
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