This isn't why I and many others on this site and elsewhere do this - We do it to experience what they experienced and do what they did. The fact that guns from several hundred years ago still survive is a testament to the fact that their way worked and worked well. If you wish to "improve" on the old master feel free, but then be intellectually honest and call it a modern gun rather than a traditional gun, even though they may look similar...
Ultimately, if the builder did even a half-way decent job of inletting, there is no need to bed a barrel. A bit like a California beach-bunny - mostly plastic with a superficial resemblance to a human.
I always find it amusing to see people who decry the use of a modern material in their “traditional” muzzle loader. They eschew the use of epoxy, or stock stains and finishes. and extoll the “old ways”..
All the while proudly displaying their rifle, with a barrel made with modern alloys, CNC milling and surface finishing, rifled with tungsten carbide cutters, auto indexed, electric machinery with modern investment cast fittings, sights, etc. screws madeon automatic screw machines. The lock made with computerized machining methods, MIM internal parts, springs etc, & made with vacuum, computer controlled heat treatment, of modern alloys, etc etc etc.. . But hey that’s the way the ole masters did it.. Nothing “ modern” in my gun. ..