Thanks for the post Arthur. I have a 33" draw and shoot 33" arrows. I had the same problems with the carbons. I actually had to use a 75 grain broadhead (which I really didn't want to use)with these arrows to get anyplace near a decent tune. I checked and I was shooting @ 6.8 FOC. I went back to 2613 this year with a 125 grain magnus. Now I'm back to 10.8 FOC. I'm also going to shot some 145 grain Muzzy's (11.8 FOC) and see how they shoot. Thanks again.