The 458 Winchester needs it's belt for headspacing. The lack of the magnum belt is one of the selling points for the 375 Ruger. It's difficult to imagine how a 45 caliber Ruger/Hornaday cartridge would be any way significantly different from the existing 458 Winchester.
What say you guys? Are my observations invalid? This is a question, not a challenge...
Looking at case drawings of the 416, it shows .515 at the shoulder. With a .015 neck thickness plus .458 bullet, that should leave .027 total shoulder. Gunner500 says .023 on his 400 Whelen, so a 458 would seem doable. That it would offer much more than the Winchester or even match the Lott I have my doubts. Same number in the mag, same length, pretty much the same velocities. But it would give the "pick fly schit from the pepper" crowd another ten pages of bandwidth.
