It was about three years ago I did a ladder test with AR-Comp and 69 gr matchking in both my heavy barrel AR and a bolt action Savage. At 200 yards I got about 1/2 moa groups (1" to 1 1/4") with both guns.
At 21.6 grains and again at 23.1 grains. (23.1 was a max load). 21.6 grains was 2655 fps in the AR and about 200 fps faster in the bolt gun. Other loads expanded a little to 1 moa.