2-piper I love math and that explains it so well. I need to get my barrels out and figure out if we took .010 out of the wall or I just had him open up the bore .010 which would be half the metal removed. My need was to remove pits not lighten the barrels. The barrels were 30" long so I bet it was just open up the bores.

Too many projects to keep them all straight. I have noted several guns felt slightly lighter after having the bore cleaned up but .005 takes care of most pits I have had removed. Or to put i t another way if the pits are much past .005 I try not to buy the gun in the first place.