I've had similar experiences with my Hunter XP (Bushnell scope). I, on the other hand am new to shooting, but my father knows how to and he had results similar to mine. We have been using Win Super X. Twice after shooting I noticed the scope rings were loose at the base, so I gave it a formal repair. I swear I read about them coming loose before I picked up the rifle. I recently saw a good video about mounting a scope correctly. I followed that and I am going out tomorrow to shoot.