We do not recommend lapping any of our mounts. Since they are machined, it really eliminates the need to do so. Since the lightweight mounts are horizontally split, you can lap if you would like. We highly advise against lapping our steel rings. Since they are a vertically split ring, lapping can knock them out of round. Our Picatinny rings, although horizontal split, do not need lapped either. They are a match grade ring and are perfectly round when they come off the machine. Note: If you lap any Talley rings, it will void any return policy since the mounts have been modified
See? No problem.
I've never lapped any I've installed. I recently received a CLR that was "Melvinized" and I'm supposing he installed and lapped the Talleys on it. They were lapped bottom rings only. Top halves left alone.
