PMC ensures that all cartridges must pass through their intense inspection of an electronic powder check station. If the propellant in any cartridge varies by even just two tenths of one grain the system stops and that cartridge is discarded. Full Metal Jacket cartridges incorporate a lead core bullet enclosed in a heavy copper topcoat, resulting in little to no expansion and deeper penetration of the bullet. Our PMC-FMJ provides smooth, reliable feeding in all types of semi-auto handguns.