Sorry people know how I feel about Stu'd calculator run the numbers all you want. I get more e-mails and PM's for arrow advise than I can count and get 95% or more of the people very close the first time and I don't need numbers, strike plate thickness, how far the bow is cut past center. I use real world experience from owning 120 different custom bows the last 17 years and experimenting with carbons for about 15 of that. I also have seen what a lot of guys say is perfect arrow flight and I really have to laugh. Shoot what ya want and have fun, just don't use Stu's calculator or my advise for that matter, experiment yourself and enjoy it, thats half the fun. Shawn