Don't lap Talley rings, substitute Burris Signature rings for them. I wouldn't own another set of anything Talley. Sorry, they are a poor performing product that leaves a scope tube scratched and deformed, and they are almost impossible to keep tight. My friend and I have a Talley laugh fest when we see some rube with them on a rifle. Rule of thumb is to never use a vertically split ring, or a one piece ring and base.
Lots give advice when they should be asking for it...
