Joe,
I remembered that you were one of the guys that had done this type of thing as a project.
I have wondered if the following is possible.
Take two identical M98 actions, cut one close to the rear, the other close to the front, swap halves, and end up with two actions, one kurz and one magnum length?
Rob, there have been only 2 things stopping me from doing this very thing, for a long time now.
The first thing is that my interest in single shots has become greater than my interest in big-bore bolt rifles; not enough elephants around here and I'm too poor to ever go to Africa(G).
Second thing is that I don't have enough tuits, not NEARLY enough!
The folks over on the AR forum are forever crying the blues about the lack of suitable Magnum and Kurz Mauser actions but yet no one over there seems to have seriously considered making their own Magnum and Kurz Mausers from 2 ordinary actions. Curious & somewhat interesting why they wouldn't at least talk about doing it, but I didn't waste a lotta time worrying about it.
Doing 2 at once would save lots of time and the only real difficulty that I see is the fabbing of the Magnum straddle floorplate. The hinged TGs could easily be cut & welded at the same time as the actions and a standard straddle floorplate could be shortened in a few minutes but the long Magnum one would hafta be a 1-off deal.
However IMO it would be quite possible to end up with $6K-$8K worth of actions for about half that amount, with some judicious shopping around for a smith and a little luck that is.
IMO you'll get a lot of negative feedback on this type project from many smiths today although it appears that it was relatively common back in the day. Certainly I was not the only student doing action shortening back then but I see no talk about it today. It ain't rocket science, just simple welding fabrication on low-carbon steel, couldn't be much simpler really. However the Super Smiths on another forum tell me that I don't know how to weld, so......
Regards, Joe