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: 300 Winchester Magnm
- Grain: 180
- Bullet: SST
- Per 20
- Muzzle Velocity: 3130 fps