Bell was an ivory hunter, and yes he did shoot a LOT of elephants with small caliber (for elephant) rifles. He didn't like the heavy recoil of the big calibers. He did use them, on occasion, but today is remembered for taking many elephants with 6.5mm, 7mm, .303 British, and some other "small" rifles. For some time, he was quite fond of the .318 Westly-Richards.
Bell is an example of what can be done, not what should be done. And, its also worth remembering that Bell left Africa after falling into serious disfavor with several African governments. The words "poaching" and "arrest" were apparently being used, and Bell "retired".
Another good source of information on taking elephants, from a different point of view is Capstick. Read "Death in the Long Grass" or his other works, I think its worth your time. Capstick did like his .470 but he shot a lot of elephants working as a cropping officer, using a Win M70 in .458 Winchester. (the govt supplied the ammo). Capstick describes numerous successes, and some failures with the .458, its worth reading.
Somewhere around 25 years ago, I got a custom Mauser in .458 WinMag. Built on a 1909 Argentine action. Found it at a gun show, always wanted a .458, and worked a trade. Spent the next couple years hunting the shows for brass, and got a couple hundred new Winchester cases.
My Mauser would not be a good Dangerous Game Rifle, it has a thumbhole stock. Somebody was building a nice mountain rifle, then put a .458 barrel on it. The gun is ridiculously light for a .458 (approx. 7.5lbs without scope), and to date, I've never shot "elephant" loads in it. Nor any factory ammo (kick and cost, waay too much for me)
I shoot (mostly) 400gr cast slugs at approx. 1800fps or so. recoil is acceptable to me, its a lot of fun, and the slugs will go a couple FEET deep in a tree, so I think they'll do just fine outside of Africa (where I'm never going to be going, anyway...)
I have loaded some jacketed 400s to 2100fps, and the recoil was more than I cared for, Also, the bullets I used were for the .45-70, and at 2100fps, expanded..violently. Like varmint bullet violently.
The .458 Lott is essentially the .458 Win Mag, with a longer case which allows enough room for powder to actually deliver the velocity that was claimed for the .458 Win (500gr), which the Win didn't quite produce in the field.
If all you want to do is throw big chunks of lead around, the .458 Win will do that and do it through any standard length action. The .45-70 in a suitable rifle will do it too but even in the strongest rifles, the .45-70 tops out about 300fps slower than the .458 Win's capability. If velocity is your goal look at the .460 Weatherby, and a couple others. But, open you wallet, wide, and have a good medical support team on standby!
