Another bad point about the Redfield windage adjustable system is the adjustment screws have less purchase on the bottom of the ring when they are adjusted away from center. The adjustment screws move on a line left-right, but the rear ring moves in an arc.
Absolutely. That is what I was alluding to above. If the rear ring turns as it move laterally (following the arc you mention) to continue to point toward the front ring, then either there is enough slop in the threads or flexibility in the windage screws to seat correctly with the bottom of the ring . . . or not.
If things are not designed to line up correctly (Burris Signature system, rings reamed and/or lapped, scope epoxy bedded in the rings, whatever the method that ensures alignment), then the mount is going to try to bend or kink the scope tube. Depending on how stiff and strong the scope tube is compared to how much "leverage" the particular mounting system has, this can be bad or not so bad. But however it works out, it is not optimum. It has always seemed to me that even if the scope is not overly compromised, the whole deal is not a good candidate for holding zero.
