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. Product Specifications Caliber: 7mm-08 Remington Bullet Weight: 139 Grain Bullet Type: CX SPF Muzzle Velocity: 2910 fps Muzzle Energy: 2613 ft lbs Quantity: 20 Rounds per box