I got interested in 9mm revolvers about 15 years ago because they were, well, a niche where you could actually come close to a complete collection. Naturally they were almost all out of production. Eventually I got S&W 940 and 547, Ruger Speed 6, SP 101, Blackhawk Convertible, later when they started making them Taurus snubby, and then recently LCR, Charter PitBull 9mm, S&W 929, 986.

But back years ago there was another option: 9mm Federal (rimmed) in the then PitBull. I spent some time trying to figure out how to shoot 9mm PB in the PitBull using single round "moon clips" to make a rim; never occurred to me to try the 9mm Federal in the moon clip revolvers and I wouldn't now. Original boxes of 9mm Federal are collectors items now (so I don't shoot it), but I wonder if that idea should be resurrected, namely a rimmed 9mm to use in moon clip revolvers without moon clips. 9mm Federal was 9mm PB loads in 38 S&W cases if anyone braver than me wants to experiment.