Our club, the Robbers Roost Vigilantes in Ridgecrest, CA, put on that event on side match day at our annual, Defend the Roost. We don’t do our annual anymore, and although we philosophize about setting up a train robbery from time to time, we haven’t done it since. It was very popular, and also included 22s, a single shot rifle, and shotgun along with the guns you mentioned. It took the fast guys well over a minute to shoot it. We used moving targets, flyers, knockdown racks—it was a blast. As far as I know, Just George came up with idea. And he was also the reason we did Defend the Roost and hosted the state BP match a time or two.