Originally Posted by
DougGuy
I would not attempt it without a dedicated tool post grinder with a 1/8" collet, and if the chamber didn't dial in perfectly on zero in the 3 jaw lathe chuck then I would have to go to a 4 jaw chuck, so right now that's about $1.000 worth of tooling and there is no way on planet earth to recoup the cost of tooling up just to do a case hardened barrel, I rarely have a call for a Shadow2 or a DW barrel for throating or forcing cone, and I have never been up against the wall in need of a 4 jaw chuck for my lathe. Yet.
I would not attempt to "Bubba" a throat into it with common abrasives and a split dowel or a dremel tool, although there are those among us who would and might get lucky and it works for them.
AND, if you DID happen to get lucky and throat it with a dremel tool, you are definitely going to break through the case hardening on the leade ins to the rifling, and now you have exposed soft steel which will erode rather quickly with full power loads. The same would happen if I did it with precision tooling, it would expose the soft metal underneath the case hardened layer and this would severely shorten the service life of the barrel.
Either you shoot it as is, and figure out the problems and solve them, or look to a different gun if no aftermarket barrels exist for it.