Yep, couldn't agree more Joe. It's finding the right people that will do the job AT THE RIGHT PRICE. It's like I find having No32 telescope parts manufactured. in v-small quantities. But I find some of the small home model engineers are superb. There will be someone with a larger home engineering hobby shop that can do.
I heard from a uk bit-part forumer yesterday that the UKgun trade have an outsource worker who deep drills their old No1,4 and Bren barrels (when they used to do this sort of work several years ago, The special drill bits were attached to a 24" long long high tensile steel rod and worked through the rotating barrel, fed with oil, from the tailstock end by hand pressure. Prevented from turning by a wooden tommy bar handle attached to the end. A standard drill finish was obtained of course.
But if the barrel was to be relined, it was left like this. If to be become a shotgun size (a technicality for certain UK laws at the time.....) it'd be honed by hand in a similar manner. Clever eh!
I wish some more forumers would come on board with ideas, plusses and minuses, pro's and cons because together we WILL make advances, believe me. Many minds make light work and all that