With 2 piece Weaver bases, using a boresighter, I shim and glass bed them so they are parallel with the bore and there is no bind on the rings.
With a scope adjusted so the crosshairs are in the center of the tube, the rifle starts out on the paper.
That's what benchrest shooters do with their rifles. Good point. It reduces angular offset in the scope to bore axis relationship. The least amount of angular offset you have, the better it is on your equipment. Mainly because you can keep the scope centered, which reduces stress. Less stress on everything is a good thing, thus the reason you also bed your bases and I'm sure you also properly glass bed your action in a stress free manner. All good things when considering shooting "long range". When you bed your bases for proper alignment, I bet you don't have to lap those rings. Something you left out of your post.
