There's another solution, shim a ring w/ doubled thickness pop/beer can. put the shim between solid side of ring and base, then retighten ring. You can also get rings that are windage adjustable, center them on mount/base, set your scope adjustment to mid point between maxed out l and r, then use rings for rough sight in at 10 yds, scope for final tune at whatever. You never replied on the suggestion to swap scopes temporarily, so it's hard to figure out what's up, lol. This would drive me nuts!! I'm gonna go out on a limb here and guess scope is the problem.