.380 ACP
Pistol cartridge designed by John Moses Browning / From Wikipedia, the free encyclopedia
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The .380 ACP (Automatic Colt Pistol, also known as .380 Auto, .380 Automatic, or 9×17mm), is a rimless, straight-walled pistol cartridge that was developed by firearms designer John Moses Browning. The cartridge headspaces on the mouth of the case.[5] It was introduced in 1908 by Colt, for use in its new Colt Model 1903 Pocket Hammerless semi-automatic, and has been a popular self-defense cartridge ever since, seeing wide use in numerous handguns (typically smaller weapons). Other names for .380 ACP include .380 Auto, 9×17mm, 9mm Browning, 9mm Corto, 9mm Kurz, 9mm Short, and 9mm Browning Court (which is the C.I.P. designation). It should not be confused with .38 ACP. The .380 ACP does not strictly conform to cartridge naming conventions, named after the diameter of the bullet, as the actual bullet diameter of the .380 ACP is .355 inches.
.380 ACP | ||||||||||||||||||||||||
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Type | Pistol | |||||||||||||||||||||||
Place of origin | United States | |||||||||||||||||||||||
Production history | ||||||||||||||||||||||||
Designer | John Browning | |||||||||||||||||||||||
Designed | 1908 | |||||||||||||||||||||||
Manufacturer | Colt's Manufacturing Company | |||||||||||||||||||||||
Produced | 1908–present | |||||||||||||||||||||||
Specifications | ||||||||||||||||||||||||
Case type | Rimless, straight | |||||||||||||||||||||||
Bullet diameter | .355 in (9.0 mm) | |||||||||||||||||||||||
Land diameter | .348 in (8.8 mm) | |||||||||||||||||||||||
Neck diameter | .373 in (9.5 mm) | |||||||||||||||||||||||
Base diameter | .374 in (9.5 mm) | |||||||||||||||||||||||
Rim diameter | .374 in (9.5 mm) | |||||||||||||||||||||||
Rim thickness | .045 in (1.1 mm) | |||||||||||||||||||||||
Case length | .680 in (17.3 mm) | |||||||||||||||||||||||
Overall length | .984 in (25.0 mm) | |||||||||||||||||||||||
Case capacity | 11.8 grains h20 | |||||||||||||||||||||||
Primer type | Small pistol | |||||||||||||||||||||||
Maximum pressure | 21,500 psi (148 MPa) | |||||||||||||||||||||||
Ballistic performance | ||||||||||||||||||||||||
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Test barrel length: 3.75 inches (95.3 mm) Source(s): Federal Cartridge[1] Buffalo Bore Ammunition[2] RBCD Performance Plus Ammunition[3] Norma Ammunition[4] |