Thanks to all of you here-

I went back and looked at the 416 again.
While kicking it's tires, we dug around for what other big bore bolt guns were there and found a Whitworth Express *brand new* in .458
The .416 had been set up with a very heavy contour barrel and had been bead blasted before blacking. The bolt face was well worn and just a tad peened and pitted.
Felt good, but after a long look at the pair I went with the .458 -- which felt better and hadn't been worn in any way at all.
I already have .458 dies and my Tolley runs .458 bullets, there are also many more bullets out there for the bigger bore.

The .458 is set up in the safari grade trim with shadowline cheekpiece and ebony forend, good wood and a checkering pattern that I can live with, and the three blade express rear/hooded front sights. This rifle didn't have a set of rings or bases fitted, I was going to ditch the mounts and glass on the .416 anyway. I've been picking around lately hoping to find a decent big bore bolt gun that I wouldn't have to spend a load of cash on, this rifle seems as if it'll do fine. I can run it with fun loads out on the ranch without having to spend real money on bullets too.

This all and I left with a pocket full of hundred dollar bills to boot, and the other guy was happy with his end of the deal.
Not such a bad afternoon after all.

--Tinker