I wouldn't start back at 37 if you have already worked up to 39.6 with no pressure signs and good groups. I did a quick search and most people seem to start around 40 grains and work up. This is a thread with some decent info: http://ukvarminting.com/forums/topic...ults-in-65x47/.

Also you may also want to try H4350 and the Berger 130 VLD's. Pardon my fliers, but a 41.5 gn load gave me 3000+ fps, no pressure signs and 0.2 moa groups.
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