I have always thought lapping was a solution in search of a problem!
Also all my rings and mounts are Leupold and I do not think those require lapping because the back mount/ring is used for windage adjustment and when you adjust those screws you are going to change the sitting of the scope in the front ring. Also some lapping supporters will tell you to only lap the bottom ring because there is enough 'flex' in the top ring. If this is true there must be enough flex in the Leupold front ring to slightly turn when you tighten things up.
If you lap you should do it just a little bit to remove some slight surface imperfections and then reblue your ring, but what do you do on silver rings?
I am sure some will disagree strongly with me.
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