I am sure that others may have a different view.
Mausers are wonderful. I like them a lot. But fixing them is not always economic.
I have purchased nice hunting rifles, Remingtons, Savages, Winchesters, Rugers, for much less than it will cost to remedy your situation correctly.
Remove barrel, inspect seats for set back, set up in lathe, correct set back, reheat treat, reset up in lathe, lap lugs, set up barrel in lathe, correct headspace, re blue action and barrel, install barrel, these all take time. If youre doing it yourself, not such a big deal. Paying for a gunsmith to do it...can be really daunting.
If it were me, I would just move on, even though I really like Mausers.
Find a nice factory rifle and just hunt it.
I know this is probably not what you want to hear, but it will be much cheaper in the long run. Sorry, but that is my honest opinion.
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Beware the man with one gun, for he likely knows how to use it...