I don't hunt them specifically to save fur and try to make money, but at the same time it's pointless to leave $20 to $50 laying in the field. No need to skin, etc, as there's lots of places buying them on the carcass.
I've shot quite a few the first few years with a 223 Ackley with 40 gr Noslers at 3750 fps. It did great on all but 1 facing shot didn't penetrate and made a mess. I really prefer now to use a 6mm of some sort just for better wind bucking ability. Like everyone says, 223 is plenty and shot placement is key. The second part of the statement is that faster, flatter, and less wind drift makes that shot placement much easier.