Originally posted by Orion: Add 5# of spine for the inch you draw past 28 inches, another 5# because you'll be pulling an additional 2 1/2-3# at 29 inches. Thus, if you're not shooting a fast flite string or particularly heavy heads, and if the bow is cut 1/8 from center, arrows spined 65-70# should work for you. Add 5# more if you're shooting a fast flite string, and another 5# if you're shooting heavy heads, say 160 grains or more. Good luck.
Originally posted by mysticguido: 62#atYour draw+5 for each " over 28" of arrow shaft = 72+5 for other then selfbow = 7780-85 spineAdd 5 for FF string and 5 if cut past center so You can be 90-95 spine..