3feathers, Just for a comparison, I shoot a 28" ceder arrow with 160 grn heads 55-60 spine out of my 53# @ 26 Wesley. The bow is marked 52#@ 26 and I draw 25 1/2" with this bow. By my scale I'm drawing 53 or 54 lbs. and getting excellent flight with this set up.Maybe it has something to do with my form, but I tend to shoot arrows a little on the stiff side rather than weak. From my experience, I would say your arrow is under spined by 5 to 10 lbs.for a 160 grn head.JM2C