We already have the .50 BMG of course which is very similar, but I can imagine there is somebody out there chomping at the bit to resurrect the 13 Mauser.

And unlike the current crop of .50's, it MUST come without a muzzle brake!!

As the .50 BMG is very like a scaled up .30-06, the 13 Mauser is very much like a scaled up 8mm Austrian.