What is .380mm?

The .380 ACP (Automatic Colt Pistol), also known as the 9mm Short, 9mm Corto, 9mm Kurz, and 9x17mm, is a rimless, straight-walled pistol cartridge.

• Caliber and Dimensions: The ".380" designation is somewhat misleading as the bullet diameter is actually closer to 0.355 inches (9.0 mm), consistent with other 9mm cartridges. The case length is 17 mm.

• History and Development: Designed by John Browning and introduced by Colt in 1908 for their Model 1908 pocket pistol. It was intended as a compact cartridge for blowback-operated handguns.

• Usage: Popular for compact and subcompact handguns due to its relatively low recoil and suitability for simple blowback actions. It's often used in pistols designed for concealed carry.

• Performance: Generally considered to have less stopping power than larger cartridges like the 9mm Luger. However, modern ammunition designs have improved its effectiveness. Typical bullet weights range from 85 to 100 grains, with velocities between 800 and 1,000 feet per second.

• Alternatives: Common alternatives and cartridges with similar applications include the .32 ACP and the 9mm Luger (9x19mm Parabellum). The 9mm Luger is more powerful but requires a larger and more complex firearm.

• Legal Considerations: In some jurisdictions, the .380 ACP may be subject to different regulations than other cartridges, particularly regarding concealed carry permits and firearm ownership.

• Synonyms: It's very common to encounter the .380 ACP referred to as <a href="https://www.wikiwhat.page/kavramlar/9mm%20Short">9mm Short</a>, <a href="https://www.wikiwhat.page/kavramlar/9mm%20Kurz">9mm Kurz</a> (primarily in Europe), and <a href="https://www.wikiwhat.page/kavramlar/9x17mm">9x17mm</a>. All these names describe the same cartridge.