Well, I've carried two .416Rem on multiple safaris in some very hot weather - 120 degrees in Mozambique was the hottest recorded on two of my thermometers. Killed a half dozen Buff and a Hippo with them. Never had any kind of problem. The rifles were a Remington 700 Custom Shop and a Winchester Special Build from their Custom Shop built to my specs. I think the .416Rem makes more sense than the Rigby or any of the others, as ammunition is generally less expensive and more readily available around the world. Shorter action also is nice.

After I killed my Ele with a .375H&H, I came home and immediately set about to buy a bigger gun. Couldn't find a .416 of any type anywhere in the USA. This was 1998 and I called every manufacturer and distributor I could think of, with no luck. They just weren't available at that time. I still prefer the .416Rem to the .375H&H and think it will do everything better. Had a similar problem a few years back when I went looking for a .458Lott. Finally located a CZ and then Bill Ruger Jr. got me one of their new M77 RSM rifles.