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| .38 ACP | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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| Type | Pistol | |||||||||||||||
| Place of origin | United States | |||||||||||||||
| Production history | ||||||||||||||||
| Designer | John Browning | |||||||||||||||
| Designed | 1900 | |||||||||||||||
| Manufacturer | Colt | |||||||||||||||
| Produced | 1900–present | |||||||||||||||
| Variants | .38 Super | |||||||||||||||
| Specifications | ||||||||||||||||
| Case type | Semi-rimmed, straight | |||||||||||||||
| Bullet diameter | .356 in (9.0 mm) | |||||||||||||||
| Land diameter | .346 in (8.8 mm) | |||||||||||||||
| Neck diameter | .384 in (9.8 mm) | |||||||||||||||
| Base diameter | .384 in (9.8 mm) | |||||||||||||||
| Rim diameter | .406 in (10.3 mm) | |||||||||||||||
| Rim thickness | .050 in (1.3 mm) | |||||||||||||||
| Case length | .900 in (22.9 mm) | |||||||||||||||
| Overall length | 1.28 in (33 mm) | |||||||||||||||
| Primer type | Small pistol | |||||||||||||||
| Maximum pressure | 26,500 psi (183 MPa) | |||||||||||||||
| Ballistic performance | ||||||||||||||||
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| Source(s): Cartridges of the World[1] | ||||||||||||||||
The .38 ACP (Automatic Colt Pistol), also known as the .38 Auto, .38 Automatic, or 9×23mmSR, is a semi-rimmed pistol cartridge that was introduced at the turn of the 20th century for the John Browning-designed Colt M1900. It was first used in Colt's Model 1897 prototype, which he did not produce. The metric designation for the round is 9×23mm SR (semi-rimmed), which is not to be confused with other 9×23mm cartridges, such as 9×23mm Largo and 9×23mm Steyr.
- ^ Barnes, Frank C. (2006) [1965]. Skinner, Stan (ed.). Cartridges of the World (11th ed.). Iola, Wisconsin, USA: Gun Digest Books. pp. 328, 338. ISBN 0-89689-297-2.