Standard Centerfire Features There are many options of PPU Centerfire Rifle Ammunition which are produced by Prvi Partizan. The PPU centerfire ammunition has been designed based on the requests of consumers combined with detailed research. PPU offers multiple options for each centerfire rifle ammunition type based on type of bullet weight and other factors allowing shooters to select the type of ammo that reflects their exact needs. Two of the most popular types of rifle ammunition from PPU are Match Ammunition and GROM-THUNDER ammunition. Standard Centerfire Specifications Caliber: 303 British Model: Standard Rifle Bullet Weight: 150 gr Rounds Per Box: 20 Casing Material: Brass Application: Big Game Bullet Type: Soft Point (SP) Muzzle Energy: 2895 ft lbs Muzzle Velocity: 2690 fps