I ran into something similar with my ACC' s. I have shot them for a year and a half now. They have shot wonderfully until recent weeks. I don' t know if I shot the spine out of them or what. I did find that 3 were slightly bent. I went back to my old GT Hunter camos and am shooting like a champ again. I don' t know what is going on. I' m very disappointed in the expensive ACC' s though. Maybe it is some kind of user error, although I would have expected it to show up in the GT' s, too.