257 Roberts +P 117 gr SST^®Superformance^®

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.