Hopefully Don Heath will find time to wade in here as he has a lot of personal African experience with the 9.3x62.
My experience with it here in Alaska on big bears has shown that there is very little - if any - difference between it and the 375.

Phil Shoemaker
Alaska Master Guide,
Alaska Hunter Ed Instructor
FAA Master pilot
www.grizzlyskinsofalaska.com

Anyone who claims the 30-06 is not effective has either not used one, or else is unwittingly commenting on their marksmanship.