I appreciate everyone’s input. I was under the impression that the action I have would handle the .458 Lott, but in "over thinking" the idea, I started to wonder. I believe it will work, and "iwantadouble's" pics showed me something I wasn't thinking about (Opening up the rear to accept the cartridge). I've talked (briefly) to a riflesmith and looks like we can get started first of the year.

Thanks for your help

Jerry