The .375 H & H was/is the lower limit for shooting the big five. True, it had a heavy recoil and I have seen an FMJ bullet go through an Elephants head. A lot of big game shooters use 450 No 1's and 450 No 2's. These are side by side guns ( I was alongside a game warden when he fired one and the barrel split) Other guns used are the .458 Win. Mag. .470 : 45/70: and Paradox guns ( shotgun, very heavy with the last 6" of barrel rifled)
Smaller game is shot with 8 x 57 JRS and 8 x 60S. 7 mm is popular too. .22 LR is not allowed on game, only for birds like Guinea fowl etc. Also 20 gauge and 12 gauge shotguns for birds only. American and European hunters come into Kenya with all sorts of guns, some very expensive, considering that a full safari with a White Hunter guide and crew could cost £20000. One white hunter who I knew well, accepted some reloaded leftover 270 rounds when hi customer left. The he went after a Leopard on Mt. Kenya, sighted on it and fired, whereupon his rifle exploded driving the telescope into his left eye. Never fire rounds that you do not reload yourself!
Cape Buffalo are one of the most dangerous animals as more people are killed by Buffalo than any other when hunting. ( I have also seen bullets bounce off their tough horns, knocking the animal sideways and starting to get up when the killing bullet was fired)
I spent 3 years in Kenya and tried everything, climbing mountains and hunting for food and fishing, caught a Nile Perch of 167 Lb. which was my weight as well. Even the wife caught a 100 lb Perch. For £50 you could fly up to lake Turkana and fish all weekend and fly back Sunday evening. Quite difficult to own guns in Kenya unless you had a game licence, I could book a shooting area about the size of Yorkshire for £3.00 and only I was allowed to shoot designated game there. Mainly I would shoot Guinea fowl, yellow necks and Francolin.
Clive, the trout fishing was superb, browns, rainbows.