For increased weight retention, deeper penetration and more knockdown power, look no further than Winchester Power-Max Bonded Ammunition. The core is permanently bonded to the gilded metal jacket using a proprietary process. This operation ensures a traditional mushroom that produces massive energy transfer for quick, clean kills. The controlled dramatic expansion is a result of large diameter upset that more than doubles the bullet's original diameter. Even with superior components and a special manufacturing process, you'll find that Power-Max Bonded is priced right, premium ammunition.This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases.