Hey TAB. Have you tried them with broadheads yet. I posted here and didn't get much response. I have the GT pro hunters and put quikspins on a few. They were shooting great with FP's. When I put on the crossfire they droped about 8 inches. I put feathers on a couple and the they fly great with the cross fire. My FOC with quikspins was 7.1 and with feathers it is 10.7. I don't know if that was the problem or not. Let me know what you find out.