I have a 44 magnum snub revolver, and I have fired exactly 3 rounds of full power ammunition in it.
All the rest has been handloads, loaded to half the power of factory loads, or less.
I can't even imagine what firing a 460 snub revolver with full power loads would be like. Not any fun at all, would be my guess, though.
Reloading is the only way to go for short barrel, big bore magnums, IMHO.