Federal Power Shok 308 Winchester 150gr CHP Rifle Ammo - 20 Rounds - Practical hunters trust Federal Power Shok rifle ammunition to deliver performance that fills the freezer at an attractive price. Power Shok Copper provides that same consistency and value in a non-lead bullet. The loads feature an accurate, hollow-point, copper-alloy projectile that creates large wound channels. Copper-Alloy Construction Hollow-Point Design Expands Consistently Accurate, Reliable Performance Large Wound Channels And Efficient Energy Transfer To The Target Lead-Free Bullet Federal Brass And Primers