Bill Ohio,
If Borden supplied your action and chambered the barrel, the barrel is id'ed. to that action. He engraves the action number on the barrel along with the number of barrels for that action. I finally made the plunge a couple of years ago and had Borden supply the action, time the trigger and chamber the barrel I sent. The service, turn around time, professionalism, etc. are second to none. Great people to deal with and, as mentioned, Jim's photography exemplifies his quest for precision and perfection.