ok. you have peaked my curiousity. What would have been the right way to do that project? I assume the original choke was a constriction at the end of the origional barrel. Is that hammered in during initial construction of the barrel? If so, then it seems that either the barrel should be chucked in a lathe and reamed or bored to whatever id is necessary for the desired thread. Or would it have been better to cut back on the barrel and start with fresh steel?
Hundreds of years from now, it will not matter what my bank account was, the sort of house I lived in, or the kind of car I drove... But the world may be different because I did something so bafflingly crazy that my ruins become a tourist attraction.