Originally Posted by backwoods83
My top 3 choices would be Imr4350, RL17, and H4350. On the slower side of things I would go Imr4831, H4831sc, and Alliant PP4000MR. With 7828 I can't see you being able to get enough in the case. H1000 and Retumbo are way to slow, that's about like using US869 in a 300wm.
If you are running a 26" tube or longer, give the slower powders a try. My experiences are that using 7828ssc, h1000, retumbo and the like are NOT to slow and actually can increase velocity with the longer tubes.
Im running 7828ssc pushing a 150 scirocco at about 3040 and this is not a max load. Lots of room left in the case.