I shot one of those once. Offhand, standing (Weaver), 100 yards, open sights, 8” group. .454 Casull was the chambering. I think it had the 7.5” barrel.
Very impressive.
Closest I have come is my Ruger .44 Mag Super blackhawk
I can get off three rounds accurately at 30 yards, after that....its guess and by golly. The hands go numb.