Hornady Superformance 30 Thompson Center 150gr SST Rifle Ammo - 20 Rounds - 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, GMX, and InterLock, bullets to levels of performance that are simply unattainable with conventional ammunition. Superformance Ammunition Is Loaded With Hornady V-Max, NTX, SST, GMX, And Interlock, Bullets For The Ultimate In Performance, No Matter What The Game Superformance Propellants Are The Heart Of Superformance Ammunition And Usher In A New Era Of Performance Like All Hornady Ammunition, Our Superformance Rounds Use The Highest Quality Cases And Primers Available. Consistent Components Translate To Consistent Shooting In The Field 100 To 200 FPS Faster Than Conventional Ammunition Uncompromising Accuracy Without Increased Felt Recoil Unfailing Performance Across A Broad Range Of Temperatures Browse 30 Thompson Center Ammo.