In my part of the country we called them "ringed shells", and I have shot a few, back in the 60s. As I got older I have often wondered about the "chamber pressure" caused by cramming not only the wadding and shot thru that thin shotgun barrel, but the shell casin also in a "choked barrel".
I know a few folks that have been shoot'em all their lives with no mishaps, but I myself am not so sure it would be good idea.