Well, now, my Brother-in-Law, who used to be in the business, used to say he was annoyed at a guy shooting a .458 Win Mag. at the range and so was gonna show up with his .50 Walker and teach him a lesson.
First, I have no evidence he ever actually got to a range. Second, of course a black powder revolver isn't teaching anyone who shoots a gun that disconnects retinas ANYTHING. Third, I didn't believe him when he said he had a .50 Walker (had to be a coupla decades ago now). Fourth, he never did do it. Fifth and finally, my Brother-in-Law, whom my Father refered to as "that clown," is FOS in basically everything he says and the very little he does.
I've never seen or heard of one, but, doesn't mean one wasn't out there.