Increase your rifle's performance up to 200 fps without extra chamber pressure, recoil, muzzle blast, temperature sensitivity, fouling, or loss of accuracy. Superformance uses progressive propellants that take your favorite V-MAX, NTX, SST, CX, and InterLock, bullets to levels of performance that are simply unattainable with conventional ammunition. Proven Hornady Bullets Superformance ammunition is loaded with Hornady V-MAX, NTX, SST, CX, and InterLock, bullets for the ultimate in performance, no matter what the game. Progressive Hornady Powders Superformance Propellants are the heart of Superformance ammunition and usher in a new era of performance. Case and Primer Like all Hornady ammunition, our Superformance rounds use the highest quality cases and primers available. Consistent components translate to consistent shooting in the field. Product Specifications Caliber: 308 Winchester Bullet Weight: 180 Grain Bullet Type: SST Muzzle Velocity: 2650 fps Muzzle Energy: 2807 ft-lbs Quantity: 20 Rounds per Box