I was just watching Tracks Across Africa
on the Outdoor Channel and they were using a .300 RCM while on safari. They took Kudu, Wildebeast, Hartebeast, Water Buck, and Leopard.
They kept trying to move in closer though, as in less than 100 yards - that just seems weird.
I think I'm still sold on the .300 WSM being the better of the two rounds. I sure do wish Hornady would make loads for it though. Getting a new rifle and considering doing your own loads sure seems to get expensive fast, although I suppose it's the cheapest way to go in the long run...