FIRST, to answer your question, YES there were black powder cartridges with
shoulders on them.

NEXT, Cartridges of the World should have all these covered
And for making cases the Donnely Book on Cartridge Conversions can be used if no current ammo is available
http://www.ebay.com/sch/i.html?_trksid=p...0&_from=R40http://www.barnesandnoble.com/w/cartridges-of-the-world-frank-c-barnes/1014029602http://www.ebay.com/sch/i.html?_sacat=0&...nely&_rdc=1AND this is NEAT, the pictures and drawings of the cases in Cartridges of the World are real size so you can lay the cerrosafe casting on the picture and determine exactness.