What about the 375 Winchester?
Okie John
EABCO sells .375 brass made from .30/30, probably with hydraulic forming of some sort. It is a bit short, so crimping could be tricky (so they say).
$59.95 per 50.
In a perfect world, I'd work toward a .375 Winchester. In the real world, I'd get a 44 Magnum long gun and work up a fast load using a 240-grain cast LFN. Not sure what make or model, but probably a Marlin lever gun or a Ruger bolt action if I could get one that groups. Other contenders are a Ruger #3 or a Remington 788, but that's moving back toward a perfect world again.
Okie John