For what it' s worth, I shoot a 64" , 57# t/d Crusader @ a 28 1/2" draw. I have found that it loves 65-70 cedars. I have tried all spine ranges from 50# to 80# and the 65-70s shoot great. I have made several sets of arrows for Chad and he shoots 80-85. I am not sure what his draw specs are, but maybe you do. Take care........Tom