Re: Groups opening up at longer range
41 to 42.5 grains of H4895, Lapua Brass, CCIBR2 primers, 175 SMK's. Should be 2,600 to 2,650 fps.
Run a ladder with your 155's and Varget, Lapua, CCIBR2. Back your 8208 load off by .3/.5 and re-try.
Proof test at 300 early in the AM, right at dawn if...