For anyone thats interested in the possibilities of this combination, here are some result from a range trip yesterday evening. Went out yesterday evening and set up the chrono and IR screens. I brought 15 rounds to test 3 at each charge weight from 63-65 grains in .5 increments. I shot all round robin style and came out with some interesting results that I'll need another trip to verify. This test was done with CCI-Br-2's instead of the WLRM primers. RL-17 & 208 A-max. 300WSM , 28" Kreiger barrel , 85 degrees F 63 grn, Average 2912 fps , ES- 47 63.5 grn, Average 2936 fps , ES- 43 64 grn, Average 2980 fps , ES- 33 64.5 grn, Average 2988 fps , ES- 37 65 grn, Average 3026 fps , ES- 21 I saw no pressure signs at all on the brass and primers. Bolt lift was normal. I believe these readings reliable since I was set up in the evening shade and had the IR screens in operation. The extreme spread is still crappy but seems to tighten up a little as you get better case fill. More testing to follow but so far I feel this powder / bullet combo might get me where I want to be if I can control the ES.