Hittingguru said:I think you have to look at more than a shaft change. I'm figuring your Beamen at 29" shaft- 340 spine- 100 grain tip, insert, 3 blazer vanes-nock--your pushing 410 grains now. Out of any recent bow getting 280fps or more, your well above 65ft.lb of kinetic enery. What is your complete set up and maybe we can give you more insight. The same arrow in a FMJ is going to be well over 475 grains in weight. That's a heavy arrow!!