I tested 150 Partitions and 140 Nosler BT's with IMR7828 SSC, H4831 SC, H4350, R22, and R26.
R26 won out, but I have choice loads circled in my book for all of the other powder options, except H4350. In my rifle, 4350 didn't group with the others and I dropped it. The 4831 SC came in second in my rifle, but 7828 and R22 were so close it doesn't really matter.
