If I thought the scope was warped, I would run a dial caliper on both ends and the tube with the scope in 'V' blocks or setting on the bottom half of the rings, if I wanted to center the cross hairs I would use the same set up, if the cross hairs scribed a circle around a point I would know the cross hairs are not centered, not a problem, it is recommended the scope point of aim be centerd with the point of impact.
F. Guffey
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