I'm kind of in the same boat. I have a SA II 53@28 my draw shooting a 80-85# hickory shaft w/160gr tip cut to 30" BOP and when I bare shaft tune 10-20yrds the hit slight right and nock left when I go back to 30yrds the miss the target to the right by about 2feet. My broadhead arrow hits about 6"-8" right of my field point arrow back at 30yrds. So I would say if you are shooting 30"draw 31" arrow you are still weak.