Point of Proof is 9 from the breach, all other measuring points are less important. The thickness and bore dia at that point is what counts and tells you if you have a gun or not. Over worrying about thickness at the oft measured thin spot of 8" from MUZZLE is pointless except to foster sleepless nights worrying about denting it down the line. Of much more interest to me is the minimum acceptable wall thickness at Point of Proof

Last edited by Clif W.; 12/18/11 06:25 PM.

-Clif Watkins