STEADFAST .300 BLK 200gr HP SMK Subsonic Reman is constructed utilizing a Sierra Matchking hollow point boat tail projectile loaded in remanufactured/repurposed .223/5.56 casings with mixed headstamps.

These brass rifle casings are remanufactured. Some of these casings may have cosmetic defects such as surface scratches, dings or light tarnish. These cosmetic defects do not affect performance.

Cycles most factory semi-auto rifles.

Velocity: ~1020 fps in a 16-inch bbl with 1:8 twist

Recommended for barrels with a twist rate of 1:8 or faster – e.g., 1:8, 1:7, 1:6, 1:5.
Slower twist rates (e.g., 1:9, 1:10) may under-stabilize the bullet and inhibit accuracy.