In RSA a .375 on gubmint land. On private land? No so much...South Africa
Legal requirements in most Southern African countries stipulate a minimum of 375 for all dangerous game. A 375 or larger is recommended for Buffalo or Lion, while hunting Hippo, Elephant, or White Rhino may necessitate a caliber larger than 375.
I've yet to bump into a PH that didn't like a quality bullet out of a 9.3mm on buff.