I don't understand the problem with the rings. They're UTG rings? If so they are cast and then machined for fasteners. There should be enough room in the fastener holes to allow the caps and base to center properly on the scope tube. They're decent rings and will get the job done but you can't expect high end tolerances from ten dollar rings. I used them for years but when my budget allowed I moved away from UTG rings (and scopes). I now use Sportsmatch rings. They're better made and very reasonably priced for the quality.Second thought is if you over tighten the rings you can bend the ears out of shape. By time this happens you'd likely have kinked the scope tube and figured out the deformed rings.
It's my opinion that you've tightened the rail lock screws so much that the wedges have been distorted. This distortion makes the rings lean when presented on a flat surface like in your photos. Your better option on that magnum springer may be a one piece mount with a pin lock.
...After the replacement scope arrived; I decided to squeeze the last life out of the old one-even though both side reticle elements were gone; I was going to use it until it simply could not be used at all.... . . . At that point I went ahead and started cranking things down-no reason not to, since the scope was already on it's way out; I had no concerns about damaging anything because it was already dead....That is why the conflicting statements; since I did actually do both things.... both careful nit-picking velvet glove treatment; and ham-fisted everything's-a-hammer torque wrenching...Jesse