SIG SAUER supersonic rounds feature a 125gr Projectile for superior accuracy and minimal dispersion when suppressed. Consistent bullet weight retention with minimal velocity variations results from optimized shell case metallurgy with premium primers. Rounds are precision-loaded using state-of-the-art electromechanical monitoring for geometric conformity. – Platform Rifle – Ammo Application Practice – Ammo Type Full Metal Jacket (FMJ) – Caliber 300BLK – Grain Weight 125 Grain – Qty Per Package 20 – Test Barrel Length (in) 16.0 ± 1/16 – Muzzle Velocity 2145 fps – Muzzle Energy 1277 ft-lbs – Ballistic Coefficient (G1) 0.313 – Bullet Length 21.3106 mm – Lead Free No – Staked Primer No