There was a discussion of Rutledge (Routledge?) bores about 8 years ago on this site. http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=8843&page=1

There was also reference to a Ritz cracker thrower which was marketed by Orvis. Threw the crackers well, but even if you hit them (we used .410's) they rarely broke