It's 5.5 grs per inch, not pounds. So you are well over that @ (13.5gpi). I shoot 345grs Easton Flatline off of my Mathews Monster M6 which what my Mathews dealer recommended, since i wanted it set up that way.
Thanks, it a Bobby Hart stock.
Last edited by stapher1; 12-28-2012 at 10:34 AM.