What is your opinion on using the 9.3x62 Mauser as a cape buffalo gun? all round plains game gun? Does it really do what the 375 does in a smaller package?
As an all aroundplains game gun I would say the 9.3x62 is hard to beat, unless you're going to hunt a region where shots over 300 yards are common, in which case something with a flatter tragectory may have an advantage. It has all the muscle you need for tough animals like Gemsbok and Wildebeest.
Does it do everything the .375 does? There are many experienced african hunters who use the 9.3x62 on buffalo and say that it kills just as well as a .375. Neither the .375 or the 9.3x62 are considered to be stopping rifles, but both are time tested and well respected for both plains game and buffalo. However in some places the 9.3x62 is not be legal to use for big game, either due to minimum calibre or minimum energy requirements that rule it out.
If you are really intesested in hearing from lots of experienced african hunters I highly recomend that you check out the accuratereloading forums, especially the bigbore, mediumbore, and african hunting sections.
The 9.3x62 is legal for buffalo in Zimbabwe and in some provinces of South Africa, but not in some other South African provinces or in Namibia. Its best to check the laws where you will be hunting.
So far I have only hunted plainsgame, and it will be a few years before I can consider going after buffalo. But when I do go after a buff I will likely stick to my .375 with 350 grain Woodleighs, they are getting very good reviews for killing power. When I go back to RSA for Kudu and Gemsbok two years from now I will also use the .375, but likely with .270 grain TSX.