I am shooting 43gr of RE15, Sierra 175 Match King, Lapua Brass, FGM 210 primers. 5 shot groups at 100y average between .4 and .6 MOA and the same at 300y. I was able to shoot a .2xx (can’t remember the last 2 numbers) 3 shot group at 300y so I know the rifle can do better than my averages, it’s just the dummy behind the rifle. I have an 18” OBR. This load choreographed at an average of 2510 placed 12 feet from the muzzle.