The Rise of Purpose-Built 10mm Ammo

The Rise of Purpose-Built 10mm Ammo

Posted by G9 Defense on 8th Jul 2025

10mm Auto: From FBI Misstep to Backcountry Favorite In the early 1980s, law enforcement found itself outgunned. A surge in violent crime and high-profile shootouts—most notably the infamous 1986 FBI Miami gunfight—forced agencies to reassess their sidearm calibers. The standard-issue 9mm …