I would like to get in on this conversation. Am I correct in saying and thinking that in England anything you may do to a set of barrels will make it "out of proof"?
What I am saying is, if you open the chokes will it make it "out of proof"? If you lengthen the chambers will that also make it "out of proof"?
Because here in the US we do that all the time with out thinking about it. Also does the "out of proof" apply to all the other guns they have over there like Brownings and Berrettas? Or does out of proof only apply to wall thickness?
Personally I am only concerned with wall thickness. If a "refinish" job is professional then it does not matter to me. I would rather have a sleeved gun than one with thin walls. But in that let me ask what is "to thin"? I have been told 25 thousands but told anything over 20 is OK. But I have heard many Maker's made their barrels even thinner to get the weight down.
