14 bore muzzle loaders are quite common but few breech loaders were made. Here in the U.K. they are classed as Antique if made before 1939 and not kept for use. I have a few cartridges in my collection but no one as far as I know makes them anymore. My 1936 Eley catalogue still lists them but only as capped cases for re-loading. I've currently got my name on a single barrel 14 bore breech loading shotgun when it comes up for sale. Just wish Magtech would consider making them! Lagopus.....