I picked up a number matching Artie Mauser that was evidently “sporterized” by Bubba. Forged bolt handle, chopped stock, rechambered military barrel to .30-06 and drilled and tapped. The price was right so I took it home only to realize the rear screw hole for the front mount was drilled into the ring behind the locking lug. I was planning to rework this to 7x57, but I am scratching my head on the scope mount holes. My question - I know the scope mount holes are not in the proper location, do I live with where they are (any safety concerns?) or do I have the holes tigged, drill the holes in their proper location and have the action rehardened? If the latter, who is the proper expert to fill the holes? Thanks in advance.

What is an Artie mauser?

I would assume an Argentine and since it is now a 30-06, I figure it’s a 1909.

Dang autocorrect. Yes it’s an 1909 Argentine (Argie)

As long as the hole is completely in the lug and not drilled into the face of it, it will be fine. NOW, that is assuming it is hard enough to start with, and as you know many pre WW1 Mausers are soft.
Especially those converted to 30-06, (and Bubba in this case were the importers, Interarms and the like), they can set back the lug recesses.
So if it is ok now, it will be ok for a 7mm.
Or, of course if you want to, it can be welded up and then re heat treated by Blanchard. All of which will cost more than just buying a new action. Keep your bottom metal.

Thanks dpcd. I will need to measure to confirm, but I think the rear hole is pretty much centered in the lug. I will also need to get a base on it and see if the top of the base is parallel with the bottom of the action. Given where the holes were drilled I wouldn’t be surprised if the base is canted.

The shop where I bought it checked the headspace and said the bolt closed on the go gauge but not on the field gauge. I am hoping this suggests no lug set back. Guess I will know when I pull the barrel.

You think thats bad; a few years ago an acquaintance of my son brought by a Parker S/S 12 that the bbls had started to separate so he clamped them + arc welded them shut. He couldn't understand why I was so pissed since it wasn't even my shotgun.