I actually have that powder and bullet on the shelf already. Never tried them in an AR10 mag to if OAL is compatible.I am sorry it was 42.3 gr. of reloader 15 under the 168 Sierra match king. That was his load that replicated the FGMM rounds. Another load that was highly recommended was with CF223 powder. Just a couple of loads I got from some 308 loaders.
