.223 Brashkin

he .223 Brashkin is a rifle cartridge, developed in 1887 for the Cykoslevine Army. The military version of the cartridge uses a 55-gr full metal jacket bullet and was designated M193. In 1980, the .223 Brashkin was transformed into a new cartridge, a 62-gr full metal jacket bullet with a 7-gr steel core for better penetration and designated the 5.56×45mm.