Check those base screws for contact. Might even see some marks on the bolt head.
Base screws are fine. I had to shorten only one of them. I have a brand new Meopta scope on it -I have no idea if the scope is good or not. One would think that it was last 10 rounds,No?
I shoot off a benchrest pedestal, concrete bench, berms on both side and wind flags. Wind was pretty much non-existent in this case. I have the whole range to myself with no distractions etc. I can walk down range and check my targets whenever I want and am careful about cooling the barrel etc.
I have shot many thousands of groups, many of them off this bench. Trigger is decent and not part of the problem in this case. I didn't tear the rifle apart and "check the bedding" etc. I just cleaned it thoroughly, mounted a scope and shot a few groups with factory ammo so I could get an idea of where it was.
I will go in the morning, take another scope and try it again.