I would add that when it comes to dangerous game bigger is better. Never have hunted dangerous game in Africa, but having personally killed two large coastal brown bears and having participated in the killing of 4 more, I have a deep and abiding respect for how vindictive and powerful they are. I'm no longer in the brown bear hunting business but if I was I'd go with nothing smaller than a 375 H&H. I'd carry a 20mm chain gun if I could.