257 Roberts + P Superformance - 117 Grain, SST, Per 20
Manufacture ID: 81353
Increase you favorite rifle's performance by up to 200 fps without extra chamber pressure, recoil, muzzle blast, temperature sensitivity, fouling, or loss of accuracy. Superformance uses ultra progressive propellants that take your favorite SST and GMX bullets to levels of performance that are simply unattainable with converntional propellants.
- Caliber: 257 Roberts +P
- Grain: 117
- Bullet: SST
- Per 20
- Muzzle Velocity(fps): 2945
Increase you favorite rifle's performance by up to 200 fps without extra chamber pressure, recoil, muzzle blast, temperature sensitivity, fouling, or loss of accuracy. Superformance uses ultra progressive propellants that take your favorite SST and GMX bullets to levels of performance that are simply unattainable with converntional propellants.
- Caliber: 257 Roberts +P
- Grain: 117
- Bullet: SST
- Per 20
- Muzzle Velocity(fps): 2945
