Scope, rings, bases, base screw holes in the action and the intersection of the action and barrel are the 5 main problems. There is also the bent barrel and stock issues. Simple things to look for. Base is tight. Rings are seated on the base. Rings are sufficiently secured to the base and scope.
Rotate one ring at a time to see if POI changes significantly. lay a straight edge down one side of the bse to see if the barrel is bent. Try the same thing on the other side to compare.
Try a different base or rings if you have 'em.
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