In my collection, there is a blank cartridge, I can´t identifiy, if it is a .56-56 Spencer Blank or a .56-50 Spencer Blank. I was told, that it is a 56-50 Spencer Blank. It has a wooden plug instead of a bullet.
Would it be possible, that this cartridge was made to fit to weapons of both caliber? I remember slightly, that I read something like that in the past.
Maybe somebody can help