Wilson Combat Sierra GameKing .308 Winchester 165 Grain Hollow Point Boat Tail Brass Cased Pistol Ammo 20 Round 20RD. Upon impact with tissue four petals break off the deep penetrating base of the Controlled Chaos bullet creating massive tissue damage resulting in quick incapacitation. Specifications for Wilson Combat Sierra GameKing .308 Winchester 165 Grain Hollow Point Boat Tail Brass Cased Rifle Ammunition: Manufacturer: Wilson Combat Caliber: .308 Winchester Number of Rounds: 20 Bullet Type: Boat Tail Hollow Point (BTHP) Bullet Weight: 165 grain Cartridge Case Material: Brass Muzzle Velocity: 2650 ft/s Muzzle Energy: 2573 ft-lbs Application: Hunting Medium Game Large Game Package Type: Box Included Accessories: None Primer Style: Centerfire Sectional Density: 0.248 G1 Ballistic Coefficient: 0.36 Lead Free: No Package Contents: Wilson Combat Sierra GameKing .308 Winchester 165 Grain Hollow Point Boat Tail Brass Cased Rifle Ammunition What is Wilson Combat Sierra GameKing .308 Winchester 165 Grain Hollow Point Boat Tail Brass Cased Rifle Ammunition good for? The manufacturer says that it is good for large game medium game hunting.Wilson Combat A308-165-HPBTG-20RD: Sierra GameKing .308 Winchester 165 Grain Hollow Point Boat Tail Brass Cased Pistol Ammo 20 Round