Hey Les, load up some of those 75's with your superformance and let us know how it works out for you. I see everyone wants to suggest the powder they use. I also have some Superformance powder I bought a few years ago. I've tried it in the 300wsm and 30-06 and some heavy 6.5 creedmoor loads, but was not overly impressed. In my 22-250, I am running AR Comp with 77SMK's. I do that because it's a powder that I can count on when everything else is only mediocre. AR Comp kicks azz. I have also ran RL15 and it has worked well. Of course AR Comp is just a reformulated RL15, so that totally makes sense. Keep us posted man.
