I guess I should have read all the post before replying. hcasniper and davidmil you guys are right I am right at 8% FOC which is a little on the light side but I am getting good arrow flight. My arrow weight is around 390 gr. My bow has a respectful velocity but not that fast. I get a better return for my money increasing velocity rather than weight for total KE. Down here the deer are not that big. I have not as of yet had any problem putting them down quickly with my setup. I have shot everything from 125 gr down to 75 gr. All have performed well with each having their plus and minuses. Thanks for the input.