Jeff,
"Using full power loads in a .458 designed for heavy skinned animals gives a pencil hole and a lingering kill.?

That is simply not true. This is misinformation to spread here.

How many animals have you shot with a .458 caliber bullet?
I have shot hundreds with maybe a dozen .45/70's, a half dozen .458's and a .460 Weatherby.
John

When truth is ignored, it does not change an untruth from remaining a lie.