Winchester's Copper Impact features a large-impact-diameter Copper Extreme Point which expands immediately upon contact to deliver massive knockdown power. Its solid copper bullet design offers improved weight retention over standard jacketed lead-core bullets. Product Specifications Caliber: 30-06 Springfield Bullet Weight: 180 Grain Bullet Type: Extreme Point Copper Muzzle Velocity: 2795 fps Muzzle Energy: 3122 ft lbs Quantity: 20 Rounds per box