I was told by a Hogdgon Tech that Superperformance has a rather narrow application with light bullets in the .243/6mm Rem class of ctgs. It may work in the 7 SAUM, especially with lighter bullets. I think they have other powders that may be better for heavier bullets, and a call to them should be helpful. I was told they use 48 different blends of powder for their ctgs., .222 Rem thru .458 Lott. They've only release a few to the public.
DF
