I gotta believe Superformance would make the 7-08 go bang. It might not be the ideal powder, but if that was what I had, I would load it and shoot it 'til it was gone as long as the results were anywhere near tolerable. I would try it with the heavier slugs, like 160-175gr, as long as your 7-08 will stabilize them (never understood why 7-08 barrels are twisted so slow). I would try magnum primers so as to get the best burn possible. Some guys shoot 4831 in their 45-70s, which isn't exactly what I would consider "efficient." With too-slow powders, at least you know you can't dump too much in the case. So what if it's 50-100 fps slower than the ideal load. Just think positive thoughts as you pull the trigger and the buck will be yours.
