NATO adopted the 9x19 Parabellum as their Formal sidearm in 1955, plus the U.S. military services exchanged the .45 ACP to the 9mm as their Formal cartridge. Many years later on, shooters are still able to find 9mm ammo for sale in virtually every gun retailer.Lewis C. said: I've operate 1000s of rounds, thru numerous 9mm hand guns. Most not long a