I have a question for any experts out there in this particular caliber.

I read that the 458 WM was really never able to achieve the ~5000 ft. lbs of muzzle energy originally hoped for, without sacrificing reliability -- compressed charges allegedly resulting in occasional ignition failures. The general concensus seems to be that Winchester should have stuck with a longer case like the 458 Lott, and the 458 Winchester Magnum can practically only achieve ~4000 ft. lbs. of muzzle energy.

Then I read about Hornady and Ruger teaming up to produce some new "short magnums" like the 375 Ruger, with Hornady using some magical whizz-bang powder. This made me wonder if Hornady might be manufacturing any 458 Winchester Magnum with this new powder of theirs, that lives up the original promise of the cardridge. I've read some reviews (link) indicating this may indeed be the case!

Has anyone here chronographed this ammunition out of a 24" barrel to verify whether this is indeed the case?