Um the Turkish Mausers in 8MM are not that hard to get ammo for. And you can Neck up and fire form 30-06 I think for them if you reload.
Discussion
This was a swiss straight pull in 7.5x53.5, as far as I can tell I’d have to get a 7.5x55 case and trim it, a .308 bullet and use load data for .30-40 krag because no one makes it. I have no experience reloading though and I’m not sure if that’s the best place to start.