Ive had good luck with 38grns Imr 3031 and the best groups so far have been with 45grns Rel 19 using 85 grain Partitions. The main thing I have noticed is that bullet seating hasnt made much difference. I have loaded the length as the factory 100grain power pts to all the way out where it barely fits into the clip and all loads havehad about a 1" group.

I really havent messed with any other bullets yet.I have some 90rn Nos Bt's and some 85grn Sierra HP's but havent had a chance to tinker yet.