Hornady's superformance uses progressive propellants that take your favorite v-max, ntx, sst, gmx, interlock and interbond bullets to levels of performance that are simply unattainable with conventional ammunition. It uses the highest quality cases and primers available which equals consistent components that translates to consistent shooting in the field. The superformance ammunition is 100 to 200 fps faster than conventional ammunition and is safe for use in all firearm types, including semi-autos, lever guns and pump actions.Specifications:Caliber: 5.56x45mm NATOBullet Type: CX SPFBullet Weight: 55 grMuzzle Energy: 1231 ft lbsMuzzle Velocity: 3175 fpsRounds Per Box: 20Boxes Per Case: 10Application: Medium GameCasing Material: BrassHazair: Yes