Norma’s ECOStrike Ammunition is a high-performance, lead-free option for medium to large sized game, The copper projectile is nickel plated, which helps increase the service life of barrels after prolonged use. The projectile is topped with a polymer tip, which is forced back into the nose cavity to initiate rapid expansion as well as enhance the aerodynamics of the bullet. The ECOStrike bullet retains up to 99% of its weight and provides deep penetration, resulting in massive wound cavities and maximum lethality. In addition, the ECOStrike bullet features a unique waist design for greater velocities and a boat tail profile for increased ballistic coefficient and greater wind resistance. Features of the Norma ECOStrike Ammunition: Lead-free, copper projectile w/ nickel plating Polymer tip 99% weight retention Norma Ammo Norma ECOStrike .308 Win 150gr Centerfire Rifle Ammo (20/Box) 20177562