Hornady Superformance 7X57 Mauser 139 Gr Gmx Spfi

7X57 Mauser 139 gr GMX® Superformance®Item #81556 | 20/Box US Patent: 8,161,885 | 8,413,587Increase 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,® InterLock,® and InterBond® bullets to levels of performance that are simply unattainable with conventional ammunition.Product FeaturesIt IS rocket science!®Proven Hornady® BulletsSuperformance® ammunition is loaded with Hornady® V-MAX,® NTX,® SST,® GMX,® InterLock,® and InterBond® bullets for the ultimate in performance, no matter what the game.Progressive Hornady® PowdersSuperformance® Propellants are the heart of Superformance® ammunition and usher in a new era of performance.Case and PrimerLike all Hornady® ammunition, our Superformance® rounds use the highest quality cases and primers available. Consistent components translate to consistent shooting in the field.PerformanceIT IS FAST: 100 to 200 fps faster than conventional ammunition.IT IS ACCURATE: Uncompromising accuracy without increased felt recoil.IT IS CONSISTENT: Unfailing performance across a broad range of temperatures.IT IS VERSATILE: This new breed of ammunition is available in 17 Hornet to 444 Marlin, and is safe for use in all firearm types, including semi-autos, lever guns and pump actions.