Guy,
Those who have hunted Cape buffalo--- swear by Swift A-frames. That's what I'll use in my 375 Ruger. I'm actually thinking of a Aussie Buffalo before a Cape. It might be an easier sell to my better half--Australia over Zimbabwe.
I used a 270 grain Hornady interlock this past June for my AK grizzly.
Bob-not to hijack, but how did the 270 interlock do? My current rifle likes them, but Ive heard they are more frangible than expected. Did you get an exit?