billwolfe,
Tha is exactly what I had in mind. Three D scanners and CNC milling machines are capable of way more precision than is needed for a barrel to action fit. And yes, after the monobloc is made the process can be taken over by a gunsmith who is in tune with nuances of balance and handling, at least more so than a CNC man would be when fitting and striking up the tubes.
The 3D process provides the unique feature of making a plastic ABS prototype monobloc that can be tried for fit before going on to the final steel version. Diagrams and drawings are OK but nothing can convey bulk and volume like a three dimensional shape you can hold in your hands and examine from all sides..
The purist objections are sidestepped by the fact that such a process leaves all original parts unscathed.
Who can do it? I am not in the US so I cannot say, but the folks at Nitroexpress.com who dabble in double rifle builds might be able to offer some info.
Last edited by Shotgunlover; 12/21/17 03:10 AM.
