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. Series Hunting Caliber 30-06 Springfield Application Hunting Bullet Type Copper Extreme Point Lead-Free Bullet Weight 180 gr Muzzle Energy 2967 ft lbs Boxes Per Case 10 Rounds Per Box 20 Casing Material Brass Muzzle Velocity 2725 fps Unit Of Measure box