For one final thought--as stated by someone who has gone on more safaris than all of use put together.(70 plus) ..Craig Boddington has in numerous articles stated he is very happy with the .416 Remington in Africa and has used on many occassions...In fact on a very recent article he was using a Ruger with a custom barrel chambered in the .416 Hoffman which was basically the .416 Remingtons twin..

As to temperatures, another consideration is that most of the safaris are done during the Winter in Africa--while it does and can get rather warm--in the 3 trips I have been there I have never come close to 120 degrees F. --- Mid to upper 90's was warmest which was usually during the middle of the day --while in the mornings and evenings-- I actually had a jacket on.. Not saying it can't --but the was my experience ..

I think the whole pressure deal is BS in my opinion.
Ripp