I was drilling out a barrel for a liner and suddenly there was a "CRACK!!" and the part of the extension that was held in the lathe tailstock chuck sheared off in the chuck. The piloted drill, with the rest of the extension (1/2" threaded rod) is now stuck in the barrel with the end of the pilot about 13" from the muzzle. This is for one of those 7/16" liners, with the pilot about .32 caliber, for a shot-out rimfire.
It was quite hot when I got it out of the lathe. Put some Kroil down there, let it cool, and banged the end of the pilot with a piece of drill rod that fits what's left of the bore with no movement. I ground wrench flats on the extension and can turn it around and around but it doesn't seem to be backing out of the drill shank, nor can I turn the drill forwards. Tried a little bit of heating but no joy.
Any tips out there on how to get this thing apart? I've done a bunch of 1/4" .22 liners and one .38 and a .45 and never had this happen. It was cutting well until it stopped.