If I were to get a Linebaugh caliber gun, I would go to Linebaugh to get it.
Having met the man, heard his and seen his data, I know that the .500 Linebaugh (and .475 Linebaugh) would be more gun than I would ever need.
(Not really planning on heading to the woods for bear and elk, etc... - sorry, never got that involved with hunting). I do know that he designed the guns and cartridges to bring out the maximum efficiency of a handgun cartridge in something that you can actually shoot well, without maxing out on the pressures involved and break guns as a result.
Full-power Linebaugh loads are managable and recoverable such that you can get a second shot off fast (two-handed) from a single action revolver. We set up a 'charging bear' - a paper plate target suspended from a trolley wire.
The plate is pulled towards the shooter and runs fairly fast, about the same speed as a charging bear. I got off two shots which both hit on the plate (would have been head shots) in the time it took the plate to traverse 25 yards. (That sucker was moving!!!!)
I am not that hot a shot with a gun I am not familiar with, yet I was still able to nail it twice. Now that is controlability!
For those who need the power, these are dang fine guns. I'm not selling them for him. Just shoot one and it will sell itself to you.
What Linebaugh does is to convert Rugers to his 5-shot cylinders, with new barrels, of course. It is not cheap, but still in line with what a custom gun will be.
Like I said, I really don't have a need for it, but have experienced it, and it was a very good gun. (shot more than those two shots, of course, with lighter power loads)
The Doc is out now.