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. – Caliber: 308 Winchester – Bullet Type: Copper Extreme Point Polymer Tip – Bullet Weight: 150 gr – Muzzle Velocity: 2920 fps – Muzzle Energy: 2629 ft / lbs – Rounds Per Box: 20