I'm looking for a cartridge for my Contender powerful enough for elk hunting to say 100/150 yds. I've been thinking real hard about the 375 Winchester. Is it really that hard to find brass for reloading? My only other conditions for other rounds are that I don't have to buy custom dies, and that the cartridge is rimmed. I know the 44 mag would fit the bill, but I'm just enough off to not want one, to common. Any thoughts? I have a 357 Max., but feel it's a bit on the light side.