Obviously it died down and disappeared, but with the current state of things, I'd be worried that if you were ever seen with it, or, God forbid, forced to use it, it would open the floodgates for more regulations regarding our beloved black powder firearms.
Are you saying if it was all you had and you needed to shoot to defend yourself you would not shoot in order to keep the reputation of black powder guns unsullied?
Remember all the wars we were in before the French developed smokeless powder, remember Wild Bill Hickock and his little 36 caliber. I think it's pretty well established that cap and ball revolvers are deadly.
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.