This Federal Fusion 300 WSM 180 grain ammunition features a lead core that is completely fused to the copper jacket, eliminating the possibility of core/jacket separation. This ammo was specifically designed for deer hunting offering a large expansion and highest weight retention for deep penetration. This design offers accuracy and excellent terminal performance. This ammunition is new production, non-corrosive, in boxer primed, reloadable brass cases. Copper jacket is electro-chemically applied to the core, resulting in a perfectly uniform jacket Boat-tail design for great accuracy Skived, pre-programmed nose provides consistent expansion Maximum weight retention for deep penetration