JoeKool: You're points are all well taken, except that most military mausers are intermediate length (57mm) rather than 30-06 (63mm) length, at least all of them I own. Hence the 350 Rem Mag is more easily used in the intermediate length actions, not to mention the short .308 length actions for which it was specifically designed. I have therefore considered the idea of a .350 Remington Magnum or some other .350 Remington case based wildcat in one of my military surplus actions.
I read about an 8mm improved on the 350 Rem Mag case that produced 2800 fps with the 200 gr bullet and 2670 with the 220 gr. Wondered what improved .350 Rem cases in 7mm, .308, .338, .366 (9.3 mm), .411, .416, .458 and .475 calibers would be like?
The Winchester Short Magnum casings are very promising but as yet I've not met anyone who's had any experience with adapting that casing to M-98 surplus mausers.