680 Loctite some G/Smiths use for that purpose. .004 to .006 th. under/bore is required for Redman liner to fit correctly. As far as noticing a bore liner at the end of a barrel crown area. That's a good question Sir. I guess it is what it turns out to be.
Last edited by Sure Shot Mc Gee; March 1, 2013 at 06:16 PM.