| silver wrote:|
Let expound on this a bit more. In a perfect world you should not have to do anything. The rings are cast, machined, polished and blued. All those steps have heat, that can twist, contract or just plain warp. Now if the problem is were your rings made before coffee break... The afternoon before a holiday break... Friday about beer thirty... Or with the boss looking over everybody? YMMV
I really don't like the rings should conform under torque school of thought. Because the thing you are really torqueing on is the scope tube. Each maker is a little differant in how they handle things. YMMV
But remember, it isn't just the rings that contribute to misalignment. If you're using 2-piece bases, the rifle's receiver holes may be out of alignment front to back and there may be some taper on the top of the receiver. Plus, screws by themselves are not able to precision locate the bases because there's clearance between the screws and the screw holes. So, no matter how precisely a set of rings are made, you may still need to lap.
As for the rings conforming under torque concept, I agree with you that in most cases you're stressing the scope tube. However, unlike the bottom ring halves of horizontally split rings that are securely attached to the bases, the top ring halves aren't secured to anything, so they will self-orient to the scope tube, and therefore can't twist the tube. There's enough clearance in the screw holes of the top ring halves that it allows for compliance to the tube orientation.