Yep, it's the shooter or his setup. Note one shooter said he had ammo that was more sensitive to the wind but shot better groups than the other ammo that shot better score. That's not the ammo friend, that's the shooter. It's easier for him to shoot the more forgiving ammo. Sometimes, it's the setup. One piece rests help a lot with this. I recommend you call my old buddy James Pappas for that solution. Although other people do make them, his is the workhorse.