Hi,
I am not into reloading my own ammo right now, and was at a loss as to what to do about shells for my Spencer (circa)1882 Pump Shotgun. While searching the Internet I came across a company in Windham, Maine, Republic Metallic Cartridge Company. They have offered to make me the correct size 2-5/8" blackpowder shotgun shells for my Spencer. This is their web site:
http://www.republicmetallic.com/ Two Flints