[joetapley]

Came across a sort of case study on this recently. Using high speed video very useful here (for those lucky enough to have access to it). The video showed the fletching (spin wings) just contacting the bow on the way past. As these fletchings are flexible no visible effect on arrow behaviour so video/powder the only way to detect this. Archer solved the clearance issue I'm told by adjusting centre shot and bracing height.