I realize that there are no proof laws here. But if you read much of what is written in other posts around these forums you will read where there are strong advocates of any work on a double be re-proofed. Now granted most of this is rechambering etc. However since the rules simply state that any work on the barrels makes the gun out of proof I was trying to get a feeling if this was a double standard issue. If so at what point and the reasoning behind choosing that point.

BB