I almost hate to ask, but what consideration was given to regulation of the barrels before soldering?
Short answer: none…..
Before removing the ribs, I clamped both tubes very tight, fitting copper sheet not to scratch the bore, and taking care not to move the clamp….
This was a scratch shotgun,and my goal was learning to resolver…. Once soldered and shot, if any problem I may learn to regulate
I learned a lot reading this and other forums, all the videos I posted on my first messages, and some books. I am not discovering the wheel, but I though I could encourage others to do barrel soldering with my experience and findings