Barnaul Ammunition 300 AAC BLACKOUT 145GR FULL METAL JACKET 20/BOX BRN 300BLK FMJ145

The .300 AAC Blackout cartridges were developed by Advanced Armament Corporation (AAC) for use in the M4 carbine to achieve ballistics similar to the 7.62x39mm supersonic cartridge, and to offer a subsonic yet powerful cartridge for the AR15 platform as an alternative to the MP5SD 9mm, all while utilizing a standard (STANAG) magazine. The Barnaul .300BLK is a 145-grain supersonic cartridge with a polymer-coated steel case. This is the most affordable .300BLK ammunition on the market today. We recommend using .300 Blackout magazines for optimum performance. Technical Specifications Bullet Type: FMJ Weight: 145 grain Muzzle Velocity (feet per second) 1985 Muzzl Energy (foot-pounds) 1268 Ballistic Coefficient (G1) 366 Max Powder Pressure Bar (lb/inch2) 50,763 Cartridge Max Length 2.15 inches Cartridge Average Weight 239 grain Manufacturer Part Number: BRN 300BLK FMJ145