if your point of impact is changing it is not the gun. it is most likely you and your scope. if you are only shooting pretty good off the bags i am almost sure it is you moving not the point of impact. if you have a scope that the point of aim changes when you move your head a little the scope is useless for any precision. this is the whole idea for buying a good scope. the better the scope the less parallax error. with a good scope you do not have to be consistent in your setup nor do you have to center your eye directly behind the scope. with a low end scope the parallax error can get out of hand with any change in the way you look threw the scope. a cheap scope would work fine for a deer because you have giant kill zone. but say shooting at a squirrel the kill zone is about an inch so you want the precision. most anybody can learn to shoot good with the right equipment.
