This is what the gunsmith working on my rifle told me:
Hopefully all goes well.Your rifle has .021" over minimum headspace due to the action lugs. About the only good way to repair this is to buy a locking block from Wolfgang at Wolverine and tig weld it then grind it down to headspace. I confirmed the idea with Wolfgang that this was about the only thing to do in this case besides scrap the action. He sold me one for $12 so I got him to ship it.
I didn't buy the rifle new, but as barreled receiver. Lucky for me I don't have much money invested.