The thread on the new .21 Sharp rimfire cartridge reminded me of a revolver I fired about 60 years ago that a friend had bought somewhere. Details have been lost over 65 years, but it was (I think) a .32 breaktop rimfire. He had bought a box of antique ammo for it and let me fire a couple of rounds of that precious old ammo. Naturally, there were misfires and sometimes when we turned the rounds they would go off, sometimes not.
For the life of me I cannot remember whether they were BP or smokeless. They might have been some of those half-and-half rounds which were made for a while.
This took place at what is now the Boulder Rifle Club range north of town, but at the time, it was still the old city dump and in fact, there was still smoke coming up from parts of it from an underground garbage fire.
That really was the most unusual gun I ever fired... for three rounds, that's all we figured I should use (which was very generous of him), and he then fired a cylinder full with one "uncorrectable by rotation" misfire. I think there were twenty rounds in a box. I assume they were mercury-primed.
Terry, 230RN
REF: (I guess they have more than one range nowadays. The one in their photo looks like the topography of the garbage dump range I used to shoot at.)
https://www.boulderrifleclub.com/