"Some person considered this old bullet to be a good deer bullet at 2900 fps from a .460 Wby" This does suggest how simple a good .458-400-gr bullet can be, and still get the job done, even at velocities of less than 2900 fps MV.
I plead guilty as insinuated........ 116gn of IMR 4064 or Varget or AR 2208 will get you to 2900fps with the perfectly adequate for anything that breathes, 400 grain bullet.
Look at it this way, if the world thinks that a 300 Magnum generating 2900fps with a 200 grain bullet is pretty hot stuff and a great medium to heavy game load then I would submit with qualification, that a 400 grain bullet such as the aforementioned Barnes X at like velocity would demonstrate adequacy to the extreme.
When truth is ignored, it does not change an untruth from remaining a lie.
