No1Mk3 SMLE full restoration - from scratch

[CINDERS]

I had that problem with a MK III according to my armorer mate (Dec) an insect had got down there karked it the acids ate a nice divet in the chamber hence it fire formed into the divet bingo stuck round. It was too deep to remove hence new barrel fitted then a shmuck broke into our home ransacked the place and stole it and my P H 22/250, in the days when you did not need a safe. (They did not get the bolts they were separately hidden)
So you can try and get them out but be wary of making the chamber so oversized you end up with head separations I suggest you have a talk to tbonesmith if he has a good 2nd hand barrel or a fit a new Armalon. From my angle looking at those pit marks I would go to another barrel cut your losses.
It gets to the stage where you go in to deep and will never re-coup your inputed $'s if your keeping it for good then fit a newby barrel and get into it as I am sure you have a soft spot for it. See Att for what I did to a couple of barrels that were shot out. The one I cut with a wafer disc is pretty rough but I like it.
Good luck.