Let me start of by saying that I am not a novice at big game hunting. I have taken an Alaska grizzly, an Alaska bull moose and several caribou. But Africa is a new horizon for me. It has been my dream for several years to get a cape buffalo. SO, after much research I picked up a Ruger M77 RSM in .416 Rigby. I absolutely love this rifle and the cartridge. However, my PH and I have talked, and it has been decided that it would be better if I took a safari for plains game first, before tackling the Buffalo. I do not want to buy another rifle. Is this rifle far too serious overkill for gemsbok, eland, sable, Kudu or wildebeast, what ever may come to pass? I know it is way more than needed, of course, but is it way too much? I have a Marlin 1895 in .45-70 which I have killed everything mentioned above in Alaska. Im just hoping there is some way I can use what I have and am familiar with. I will talk to my PH about it and get his advice of course, but I wanted to get opinions from here as well.