I' m wondering if he isn' t torquing the bow when he is holding it. If he torgued it enough that would acount for all three different bows doing the same thing. Tell him to relax his grip on the bow and see if that helps any. It could be that when he snap shoots he doens' t have the time to develop as much torque and thats why its seems better to snape shoot. My bet though is that he is choking the hell out of his bow and if he would relax his grip he wouldn' t be getting the torgue that is causing the bad clearance problems.