Almost 40 years ago (yikes) a guy working for my father made a couple. I machined the lugs for him out of 4140, and he had a buddy TIG weld (certified) them on. Chambered for a cut off 30-30 case with a .375 bore. Bullets were hand swaged, and pistol weight. Barrel was a Douglas CM blank. AFAIK, he lived to a ripe old age and was no pansy when it came to loading ammo.
I've thought about making some lugs to thread barrels in, but I wouldn't put anything bigger than a .22 Hornet in one. There was someone a few years back making them.