I suspect that the new 500 cal would be purely academical. As I said I used to have a 500 A-Square and a 460 Wby, 458 lott and a watt. Now back then I had a lot more muscle than today and I am bigger than the normal person. The recoil was not managable. I never could shoot it accurately out of hand and I sold the rifle/s. I never could achieve more then 2350fps with a 500gr Barnes bullet. Tested it at the SA Police Forensic lab with all the powders available and suitable to that cal but nope the proclaimed speed by Art Alpin in SA was not achieved. Gladly so, the recoil was astronomical.
Seen so many buffs killed by a more accurate bullet (even .223) than a big magnum.
There are however always a place for a new cal.
I do like the 338 AM and 375 AM. Longrange shooting cal in high wind drift makes sence.
I am not familiar with hunting in the US. Planning to hunt there in 2011.
That is if I can get past your Visa control. They are extremely difficult and rude. Cant blame them. So many idiots want to hi jack your country.