I think you mean the 460 S&W Magnum, the big pistol cartridge. Can't think of any. Of course, there is the 460 Weatherby Magnum, a different animal altogether.
You can get 20" Encore barrels in .460S&W. It makes for a great rifle. The .460S&W out of an 8+" revolver comes out at around 2300fps. Out of a 20" closed-breech barrel, it comes out at 2800+fps. That makes it a pretty serious thumper.