Re the rebarrelling or tube sets or whatever path to follow going forward, the advice to put it up and move to another project for a while is quite sound advice. You have the gun and not rushing into anything in particular but letting the solution unfold will turn out for the best. Take the time to work on another project while researching how to fix the problem.

I've never had dealings with Briley, but I'll suspect they (or any dealer in tubesets or such) will decline to put their hands on any set of barrels with a(n unrepaired) hole in them.

fiery, dependable, occasionally transcendent