From my research I think the .458 winchester magnum or .458 lott, the .375 H&H, and the .30-06 are good choices. The .458 lott of course will shoot the .458 winchester magnum. Those three cover a broad range of hunting opportunities and are common calibers in Africa from what I have been told. I am taking a .375 ruger to Zimbabwe and just pray my ammo makes it too. If I were taking (or owned) a double rifle it would be a .470 Nitro Express. I will have one some day. For now due to financial limitations, my choice is to buy a double rifle, or go to africa, not both unfortunately. I am buying a lottery ticket tonight though. I dare to dream!