NATO adopted the 9x19 Parabellum as their official sidearm in 1955, and also the U.S. military exchanged the .45 ACP for that 9mm as their Formal cartridge. Several years later on, shooters remain able to find 9mm ammo for sale in nearly every gun retail store.Lewis C. reported: I have run Countless rounds, thru many 9mm hand guns. Most just lately