Range Time 9MM LUGER 147 GR RN X-Treme Bullets features copper plating applied electrochemically to a precision swaged lead core. The base of the bullet is also fully coated in copper. X-Treme 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. Our process starts with a lead billet that is extruded into wire. The lead wire is then swaged into a core. The cores are copper plated, then re-struck once more. Though not common in the industry, this restrike process produces a bullet that is more uniform, with a more precise diameter and a smoother finish for a better shooting and a better looking bullet. X-Treme Bullets Copper Plated projectiles are re-struck to ensure our diameters are precise and consistent from bullet to bullet and lot to lot.