Never seen a need for it, but I can see where it would be needed. I have gone to the Burris Signature Zee rings with inserts in the last few years and like them a lot, no need for lapping. I got four riles wearing them now.I do. You'll be surprised how little contact most scope rings have between the scope rings and the scope tube until you lap a set. I think it helps with repeatability. All of mine, except the rifles wearing Burris rings with inserts, are lapped.
Elkbane
might have to bed a 1 piece too these daysLike a 2-piece base and rings on a R700, plan on lapping or bedding the base.
No need to lap with the DNZ Products Game Reaper 1-piece base & rings.
Unless you mount them to a receiver that causes the base to flex once tightened down.