Re: need help designing a new case
I can push the 240 SMK close to 3200 fps out of my .30-.416 Rigby Improved. After that, accuracy falls of dramatically, not to mention case life.
My accuracy load is running around 3100 fps, and has gone under 12 inches at a mile.
I can't see the need to want to drive that bullet any faster. The .416 Rigby case is about the largest case that I would consider using, and it's an ordeal to prep 100 pieces of brass.