Went out to sight in my new 22 magnum today. It shot far to the left and by the time I got it close (still 2 1/2" to the left) I ran out of adjustment on the scope (new Nikon Buckmaster). The gun is a Marlin 983s with Weaver bases (gun is drilled and tapped) with Burris Signature Zee rings. Any suggestions? I ran the turret adjustment back all the way to the left and started over with 25 clicks back to the right and then try another shot. The point of impact changed after each adjustment, of 25 clicks. But when it returned to the original 2 1/2 " to the left I ran out of adjustment again. Any Idea? ???