I now use only the Sierra 65 GK in my Colt ARs. It's a very accurate bullet that equals the accuracy of the 69 MK, at least up to 200 yards. I was hoping my most accurate load would be with TAC powder because it meters so well. After shooting lots of groups with both the 65 GK and the 69 MK, H4895 provided slightly better accuracy than TAC. Of course, H4895 doesn't go through a measure as well as TAC.
