The .224 BOZ cartridge was developed in the late 1990s with the purpose of defeating body armour. The .224 BOZ began as a 10mm Auto case necked down to .223. Original trials were exceptionally successful. Worldwide patents were applied for and granted. This innovative round fired a 50 gr projectile chronographed at well over . The editor of Guns & Ammo came to the United Kingdom to personally fire the .224 BOZ and wrote a detailed illustrated report in the November 1998 issue with front page banner headlines and eight page review.