Winchester Copper Impact 6.8 Western Ammo 162 Grain Copper Extreme Point Polymer Tip Lead-Free ammo review offers the following information;Winchester Copper Impact ammunition combines Winchester’s extensive experience into a product engineered specifically for big game and deer hunters. The Copper Extreme Point bullet is a solid copper expanding projectile with an oversized impact diameter. A bigger impact diameter means more impact trauma, better energy transfer, and larger wound cavities for faster knockdown. This ammunition is new production, non-corrosive, in boxer primed, reloadable nickel-plated brass cases.