The ‘machine loaded’ shells and components available in the 1895 Montgomery Ward & Co. catalog
http://books.google.com/books?id=zWe...page&q&f=false
The 'Trap Shooters Delight' could be ordered with "E.C.", Schultze, American Wood, Black Powder, Dupont Bulk Smokeless or Laflin & Rand Bulk Smokeless powder. 12g Winchester “Leader” and “Blue Rival” NPEs and UMC 12g Green “Trap” NPEs are offered.
Winchester Leader with Mullerite
U.M.C with whatever Bulk or Dense powder you desired
After about 1905 the shell makers stopped listing the specific powder