Africa
I have used .300 Win Mag 180 nos parts @ 3200 fps and .416 Taylor with 400 gn softs and solids @ 2410 fps. .300 Wby with 200 nos part @ 3200 fps .416 Rem factory solids with 400 gn sledgehammers, .375 H+H with 270 gn TSX @ 2900 fps and .470 NE with 500 gn softs and solids @ 2160 fps.
I used the .416 Rem with the factory ammo for elephant as it was a loaner rifle. I had my family and spent a bunch of time in Europe and did NOT want to drag a rifle through 6 different countries. I highly recommend this if you are planning to do any other travel, as travelling abroad with rifles is getting more and more difficult. Having said that, if you are going to SA it's not bad just make sure you start the paper work well in advance.
Which ever caliber you choose shoot it lots,lots,lots get the feel of it and use the best bullets money can buy those critters are tough.
Last trip was to Zambia last Oct and I took 2 bull hippos, a leopard, puku and a croc, did it all with the .375 H+H and 270 gn TSX worked flawlessly.
.375 would work on elephant and has many, many times, but it would not be my first choice. Those big buggers are getting more and more aggressive as they lose more habitat and over crowding is happening. Hunting them is a lot more dangerous nowadays than it was in Bell's time or even Taylor's. The population explosion in the African countries has caused much more interaction between the population and the elephants. None of the blacks have guns so the elephant has basically become fearless of man, not just fearless but down right aggressive.
My experiences have caused me to purchase a double rifle in .470 Nitro Express and I will never again be caught in elephant country without it even if I'm only hunting plains antelopes with my .300 if there is elephants in the area I will have my .470 handy.
If elephants are on your menu buy a very big gun, that's my advice. The most popular one over there right now is the .458 Lott. A large number of PH's I've talked to use this, especially those who can't afford a double. The CZ 550 is available in this and a couple other good calibers. It ain't real pretty but it is reliable and relatively inexpensive and has been used a lot over the pond, and is used by at least 2 PH's that I know, so that is always a good indicator. These guys bet their lives and those of their clients on their rifles, so you know reliability is #1 on their minds and effectiveness is #2 and pretty comes in about #100
If finances permit you I would recommend a double in either the Heym or I have the Merkel, for the big boys in either the .470 or .500 NE. If I were to do the double again I would go for the .500 they cost the same and the .500 is a significant step up, however the .470 is the industry standard as doubles go with the PH's who have doubles.
That's my advice for what it's worth and I hope it answers your question.
There is an old saying about elephant guns "There is no gun too big for elephants but are many too small"
PS if you are for sure going to do this give me an e-mail and I can give you some names who I whole heartly recommend on everything from duiker to elephant and just about any country south of the equator in Africa. No need for you to find the crooks the hard way as I did to some degree. Always remembert not all hunting operators are equal but they are all expensive. e-mail
ies@polarcom.com