Count0- I concur with Richard that JR is correct. I would further add, to stay away from the lapping compound. Case in point; it you look at the wear points on a new Wilson, Baer, NightHawk, etc. The creme de la creme. You will notice that they do not wear Evenly. Thus, if one was to lap a gun in/at it's wear points, I believe that they could do more harm than good.