Yeah i agree with SWAMPCOLLIE it might be you. Even though i am new to shooting a bow i researched how i am supposed to stand, loosening my arm, placement memory (as in where u place your string on your face), and when releasing let it be a surprise. Its worked for me but believe when i dont concentrate 100% on all those things my groupings are way off. Maybe you have picked up a bad habit when u shoot that you dont notice b/c u have been doing it for so long. I suggest starting from scratch and if that dosnt work maybe there is something wrong with the bow. Maybe let somebody else that is similar to your size shoot it.