Corbon's Performance Match ammunition provides you with the leading edge in accurate target & competition ammo. They use the most accurate bullets available. The combination of reduced recoil with the lower muzzle flash and smoke of their Performance Match ammunition will give you the confidence to become a champion. Sierra HPBT (Hollow Point Boat Tail) Bullets have a hollow point design with a very small meplat for high ballistic coefficient. These bullets have a boat tail shape to further minimize drag and improve ballistic coefficient. They are manufactured to the very highest quality standards. Their accuracy has been acclaimed worldwide, and they have been used to win more target competitions than all target bullets from other manufacturers combined. Specifications Caliber: 338 Lapua Bullet Wt.: 300gr HPBT Subsonic Velocity: 1000fps Energy: 666ftlbs Test Barrel Length: 20.0 Inches Twist Rate: 1 in 9 20 rounds per box Box Weight: 2 lbs You must be 21 years or older to order ammunition. Ammunition must ship UPS ground. Due to safety considerations and legal/regulatory reasons, Ammunition may not be returned. Please check local laws before ordering. By ordering this Ammunition, you certify you are of legal age and satisfy all federal, state and local legal/regulatory requirements to purchase this Ammunition.