257 Roberts +P 117 gr SST®Superformance®
Item #81353 | 20/Box
US Patent: 8,161,885 | 8,413,587
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.
