Bronze Features PMC s Bronze Handgun is manufactured with the same quality and dependability built into the Starfire ammunition. All PMC cartridges must pass through the rigorous inspection of the electronic powder check station. If the propellant in any cartridge varies by as little as two-tenths of one grain the system stops and that cartridge is discarded. Bronze Specifications Caliber: 223 Rem Model: Bronze Bullet Weight: 55 gr Rounds Per Box: 20 Casing Material: Brass Application: Target Hunting Defense Bullet Type: Pointed Soft Point (PSP) Muzzle Energy: 1250 ft lbs Muzzle Velocity: 3200 fps