I know this gets asked a lot, and I looked into it and I think my buddy is right on the border. Here's the siutation. He'll shoot fine for a round or two then all of the sudden he'll get a round of fliers. He just put new cams on so I would imagine the bow shop tuned it, but I'm not positive. I measured the specs and the ata and brace height are dead on.
He's shooting a Mathews LX (no that's not the issue :wink

28.5 inch draw length set around 62 lbs (I think. It was around 66 and we backed it down 2 turns to see if that would help, but it didn't). He shooting a 29 inch (not counting nock and field tip) Easton Axis 400's with a 100 grain tip. Is this ok? I think the 340's would be better but I'm not sure.
Do you have any other ideas if he's spined correctly? I don't think he's getting fletching contact.