the posibilities are endless IF steel case head can handle the pressure...SURELY an entire steel case with beefed up dimentions EG thicker sidewalls and base will have said same pressure coping abilities....
so,something like 22-250 powder capacity internally.....
you could go oldschool and lengthen case to increase capacity..... so a high pressure .45/70 in a case with say .45/90 external dimentions but same capcity internally as shorter round.
it almost would make the likes of WSM redundant if you beefed up the case walls and base and were able to up the pressure with less powder of diferent sort....
or could even make them MORE attractive with beefed up ammunition....like the plus P loads in handgun but oh so much more so.
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