I used to have the same problem and I was assuming that something was wrong with my bow. Turns out, it was me. the farther away from the target I got, it seemed I started torque my bow. I guess I was concentrating harder and trying to move as little as possible and I was tensing up. I have since corrected my grip, and all is well. Could be your problem too, as opposed to something wrong with the bow, which makes it an easier fix!