Hello Mike,
Hopefully you can make it in October to Africa with your .375H&H from H&W. The problem for us Europeans with the big bore rifles from H&W is that we cannot use them on a regular basis for hunting unless we are traveling to Africa. Therefore I had H&W build me something smaller, a .257 Roberts on their short length action and a .300H&H on their Magnum action. The later one of course makes also a fine plains game rifle.
Best regards
Robert