Characteristics
.380 ACP Caliber
The .380 ACP - (Automatic Colt Pistol) (9×17mm) is a rimless, straight-walled pistol cartridge developed by firearms designer John Moses Browning. It was introduced in 1908 by Colt.
.380 ACP Bullet
90 gr (6 g) Buffalo JHP 1,025 ft/s (312 m/s) 210 ft·lbf (280 J)
95 gr (6 g) Federal FMJ 980 ft/s (300 m/s) 203 ft·lbf (275 J)
100 gr (6 g) Buffalo HC-FN 975 ft/s (297 m/s) 211 ft·lbf (286 J)
95 gr (6 g) Buffalo JHP +P1, 125 ft/s (343 m/s) 267 ft·lbf (362 J)
45 gr (3 g) RBCD TFSP 1,835 ft/s (559 m/s) 337 ft·lbf (457 J)
.jpg)
The .380 ACP cartridge was derived from Browning's earlier .38 ACP design, which was only marginally more powerful. The .380 ACP was designed to be truly rimless, with headspace on the case mouth instead of the rim for better accuracy.
Although the low power of the .380 ACP does not require a locking mechanism, there have also been a number of locked-breech pistols chambered in .380 ACP, such as the Remington Model 51, Kel-Tec P3AT and Glock 42; all three being designed to be lighter than blowback operated .380 ACP weapons.
The .380 ACP has experienced very widespread use in the years since its introduction (1908 United States, 1912 Europe).
Case type Rimless, straight
Bullet diameter. 355 in (9.0 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)
Max. pressure 21,500 psi (148 MPa)
Bullets .380 ACP Auto
