HORNADY Superformance 7x57mm Mauser 139 Grain GMX Ammo, 20 Round Box (81556)
- Superformance is a cutting edge technological advancement in ammunition design that transcends convention
- Superformance ammunition is 100 to 200 fps FASTER than any conventional ammunition on the market today
- Superformance uses ultra progressive propellants that take your favorite SST or GMX bullets to levels of performance that are simply unattainable with conventional propellants
- Superformance provides increased performance, and is safe to use in ALL firearms, including semi-autos, lever gun and pump actions
- Increases in rifle performance, no increases in barrel wear and felt recoil, along with superior temperature stability are all realized with Superformance ammunition
- Superformance ammunition is safely within SAAMI pressure guidelines. Gas operated firearms are perfectly safe to use with Superformance ammunition
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