.380 ACP

.380 Automatic Colt Pistol (9x17mm) - 1908 - John Browning

Diameter - .355 Inches

The .380 ACP (Automatic Colt Pistol) pistol cartridge is a rimless, straight-walled pistol cartridge developed by firearms designer John Browning. The cartridge headspaces on the mouth of the case. It was introduced in 1908 by Colt, and has been a popular self-defense cartridge ever since. Other names for .380 ACP include .380 Auto, 9MM Browning, 9MM Corto, 9MM Kurz or 9MM Short, and 9X17MM