Shooters World Blackout with Brazos 215gr Coated in 8.5″ AR Pistol

Here are my results from loading Brazos 215gr Hi-Tek powder coated bullets in 300 Blackout using Shooters World Blackout powder.

The first batch I loaded, I started with 10.2gr and had a couple feeding issues. The velocity was too low and it wasn’t powerful enough to cycle the gun.

The next two batches tested were 10.5gr and 10.8gr and both functioned flawlessly.

Bullet	Powder / Charge	OAL	Velocity	ES	Notes
215gr Brazos	10.2gr SW Blackout	2.05″	938.6 fps	32	Had a few failures to feed
215gr Brazos	10.5gr SW Blackout	2.065″	946.7 fps	32	No issues
215gr Brazos	10.8gr SW Blackout	2.065″	997.6 fps	54	No issues

It looks like I have found a working subsonic load for my 8.5″ AR Pistol running at velocities similar to a .45 ACP!

The velocities are low enough that even if using the same load in a longer barreled rifle, the load should still stay subsonic!

The rifle was a little dirty with gold specs (the same color of the Brazos bullets) so I am not sure if it was unburned powder or some odd coating deposits. This was noticed after all three loads and is not a big deal as the rifle cleaned with no issues.