X-Treme Bullets Full Metal Jacket (FMJ) bullets are proudly made out of the finest materials available in the United States in order to ensure performance delivered down range with each and every shot. X-Treme Bullets uses state of the art manufacturing technology deigned to encompass the lead core in a copper jacket, which is not intended to expand upon impact with the target. A cannelure is added to provide a better hold during the crimp process. These bullets are ideal for target shooting, plinking and varmint hunting. This is not loaded ammunition.