Ruger has made .38/40-10mm convertable Blackhawks from time to time, I believe. Writer Mike Venturino is fond of pointing out that the .38/40 in a revolver using black powder is pretty much identical to a .40 S&W. He also has done pine-board penetration tests with full-power .44/40 and .45 Colt black powder loads, and they are pretty impressive. Believe he uses fff to duplicate the old loads' velocities.
The pictures of his .45s in full recoil make some of the tv and movie shooting scenes you see highly unlikely. Those puppies kicked!
Yeap, they blow flames like a dragon.
44-40 website
