I have an English gun that is on face but loose on the bolt. It will not close on a piece of typing paper but the lever is to the left and there is up and down movement.

I took the bolt out and it is obviously worn. I know the barrel lumps are soft but the underbolt is difficult to cut with a file. The welder can lay in either material that is about 60 Rockwell or a bead that is soft. It seems to me the the hard material may be too hard. The bolt engagement has about a 15 degree taper and I'm thinking soft material for the bolt may be the way to go.

And yes the welder is an experienced expert doing firearm restoration. He just needs to know what I want.

Thoughts appreciated.