ScottT,
That 500 Linebaugh is a beauty. And I think there is something to be said for having a custom from the guy who invented the cartridge. As for your choice of cartridge and game, I am right there with you. I carry my 475 every day and it has killed way more coyotes, racoons, skunks and gophers than dangerous game but at least a thirty or forty to one ratio. I have yet to recover a 420 grainer from any animal, game or varmint. I too load em down to about 980 fps. The last racoon I popped was standing in front of a 16 inch thick tree. I got full penetration on both and neither of them, the racoon or the tree took another step.
Steve