I made a post a long time ago asking much the same question. As I recall, I had one response that indicated OAL was too much - but I've never seen any measurements.
I think it would be a swooft load, contrary to the Keith school of thought. With just 200g of bullet and a nice ballistic coefficient, I can imagine some really fast muzzle velocities out of a Blackhawk. I'm thinking 1400-1500 fps. Should be a nice ballistic profile out to 100 meters.
i thought they seemed a little short but i hadnt got around to messuring them yet. that would make a big difference. are they .44 spl length then?
that would throw the charge vs. pressure off if you tried to load them in a standard case or trimmed a case to lenght