When Matt Graham still walked the earth, his .458 bolt rifles were popular with clients for buffalo, and I loaded for them often using Woodleigh 500gr RNSNs at 2150 fps with no pressure signs whatsoever.

I have posted many times before: Woodleigh bullets and ADI powders (=Hodgdon Extreme) elevate the .458 Win Mag to the dangerous game cartridge Winchester always hoped it would be.