Four so far...
First was a PM9 I bought about ten years ago. Bought it used, night sights, 2 mags, for $450 IIRC. It suffered from the "barrel peening" issue that afflicted a certain s/n range. Sent in the "top half", Kahr replaced it, and it's worked perfectly ever since--any ammo, any time. Carried it every day for three years, then experimented with other things for a while, but fortunately I never sold it, and as of a couple years ago, the PM9 is back in my pocket every day.
I bought a P45 about a year after the PM9. Worked perfectly with any ammo, and I carried it in the winter for a while.
The opportunity to buy a PM45 came up, and I took it. I though it would be a perfect combination of the .45's power and the PM9's size. It was a bit picky about ammo, may have had a short chamber. I figured out that it wasn't "that much" smaller than the P45, and the capacity was only 5+1. Sold it to a friend who loves it and carries it.
Just recently added a CW380. Been loading my own ammo for it, with only moderate success so far; works fine with factory ammo.