Freedom Munitions Big Grains 12.7x42mm 325 Grain RNFP Brass Rifle Ammo 20 Rounds. 7x42mm and due to copyright constraints from Alexander Arms this caliber is listed under 12.7x42mm. Everybody loves showing off their big bore firearms but the cost of shooting them can be painful. Big Grains is here to meet the demands of the big bore aficionado with affordable ammunition in the most popular cartridges. Built using premium copper plated projectiles from X-Treme Bullets Big Grains offers economy and accuracy in cartridges traditionally seen as too expensive for high volume shooting. Big Bores. Big Bullets. Big Grains. Specifications for Freedom Munitions Big Grains 12.7x42mm 325 Grain RNFP Brass Rifle Ammunition: Manufacturer: Freedom Munitions Caliber: 12.7x42mm Number of Rounds: 20 Bullet Type: Round Nose Flat Point (RNFP) Bullet Weight: 325 grain Cartridge Case Material: Brass Application: General Package Contents: Freedom Munitions Big Grains 12.7x42mm 325 Grain RNFP Brass Rifle Ammunition What is Freedom Munitions Big Grains 12.7x42mm 325 Grain RNFP Brass Rifle Ammunition good for? The manufacturer thinks that it is best for general.Freedom Munitions FMBG50BRF325N20: Big Grains 12.7x42mm 325 Grain RNFP Brass Rifle Ammo 20 Rounds