I've got an online friend who is also an African PH and Outfitter, down near Cape Town, he is the real McCoy. This is not someone who hunts an occasional weekend or for a week, but who harvests animals on a regular basis. That is his living. The animals in Africa are usually tougher than in N.A., but Africans rarely use high velocity magnums. They prefer mostly round nose type projectiles, at 1800-2200 fps in most cases. For dangerous game, big bore projectiles are usualy the rule.
My friend JB has taken many Kudu, an antelope which is somewhat comparable to an elk, with his 6x45mm, which is a .223 case necked up to 6mm, loaded with a 100 gr. R.N. at 2200fps, at no more than 120m, for this cartridge. He also uses a 7x57mm, which very popular in Africa, and a .375 H&H. The .375 H&H, JB shoots downloaded to around 2200fps, unless he is going for dangerous game or one of the Big 5.
The main reasons that they eschew H.V. in Africa is to prevent unnecessary meat destruction and for the incredible penetration a projectile that holds together can give. Also, they pay dearly over there for firearms and premium bonded projectiles, so it is much less expensive just to avoid using the latest super magnum.

This is a 6x45mm with a 100 grain Round Nose. Read the headstamp, JB sent me this brass.