I have only used it through my Dillon 650 for doing .224/5.56 and it did OK. My velocities were pretty consistent despite mixed brass and being loaded on a progressive. I was loading the RMR 69GR 3GH with 22.5gr which was disappointingly popping primers in my Bergara .223 Wylde chamber, but not in any of my 5.56mm chambers.
Max velocity: 2976fps
Min velocity: 2916fps
Avg velocity: 2950fps
That barrel will throw CBC 77gr SMK MK262 clone ammo at 2958fps average with no blown primers. Just dont expect top velocity with the AR Comp. It also produces less gas than many other powders. Shooting suppressed with my 24" Bergara barreled AR with a rifle length gas system using an Adams Arms piston system, I have to run it on the unsuppressed setting, but all other powders will run on the lower gas suppressed setting.