hey thrillatthahunt,
I love finding those old black powder rimfires. I've been accruing quite a few myself.
As far as your question goes...both the 1866 Winchester and the .44 Henry used a double striking firing pin. The old black powder rimfire cartridges were notorious for not firing, hence the design. Some have been found with several "sets" of strikes on the same round.
HH,
BW