i had one where the action was off from front to rear. i had a luepold rail on it and could not get it on paper. didnt have enough adjuctment in the scope even thought the bore sight looked fine.
i took the rail off and tighten the front screws only when i put it back on, doing that i saw the rear of the rail pull up. looked to me like .020 inch. i ended up putting a 2 base scope mount on it and getting the i think burris rings with the inserts taht alow you to off set the scope.
i didnt want to shim the one piece rail, would have work i guess but i didnt want to do it. the 2 piece mount and rings work fine. i bore sighted agian and was on paper.
i took the rail off and tighten the front screws only when i put it back on, doing that i saw the rear of the rail pull up. looked to me like .020 inch. i ended up putting a 2 base scope mount on it and getting the i think burris rings with the inserts taht alow you to off set the scope.
i didnt want to shim the one piece rail, would have work i guess but i didnt want to do it. the 2 piece mount and rings work fine. i bore sighted agian and was on paper.