Trevor, Your longer (by 1") draw length than the OP's makes a difference as well. If you were an inch shorter even your fairly fast 70# compound would be closer than it seems now. From your original post I'm thinking 316fps with a 350 grain arrow since you called it IBO. Down an inch in draw would be (approx.) 306fps with the same 350 grain arrow yielding less than 73# KE

One thing for sure several 50# bows now pack more than enough punch to take down NA Game.

Dan