I carry an S&W 642 (roughly same size as your LCR) as a weakside backup in a pocket holster. Have done so for almost a decade. In the fall of 2005 I bought a NIB PM9 as a possible replacement for the 642. I liked the extra capacity, the superior sights, the smaller size of the PM9, etc.
The PM9 has had some issues of failures to return to battery with various types of factory ammo, about 10% during the first 250 rds and about once in every 500 rds since then.
Then there’s the Kahr “load the first rd from the mag with the slide locked back” issue. Kahr in the owner’s manual advises owners not to slingshot the slide to chamber a rd, saying this can result in a failure to feed. My experience bears this out. Kahr recommmends locking the slide back and loading a rd into the chamber by dropping the slide stop lever, and my gun has always worked okay using this method. If the slide is forward on an empty chamber and I attempt to load a rd into the chamber by pulling the slide back and releasing it, the gun will sometimes reward me with a nosedive failure to feed. Numerous other Kahr owners have reported similar experiences, but some report not having this issue. The real issue here is whether the gun will respond to a tap-rack-bang technique of clearing a malfunction. I have tested the tap-rack-bang with the gun using dummy ammo, and it worked okay, but haven’t tried setting up a malfunction using my carry ammo (Federal P9HST2 147 grain std pressure). My thinking is this: If the gun won’t consistently load a rd from the mag with the slide forward by pulling the slide to the rear and releasing it, then how can I expect a tap-rack-bang to work?
I have consistently changed the recoil spring assembly at about every 1000 rds.
I’ve put about 2k rds through the PM9. At about 1800 rds it went back to Kahr to fix a significant barrel peening problem, an eroding mag release problem, and to replace the missing frame access plate screw/pin. It’s back and all seems well.
The PM9 for me doesn’t draw as smoothly from a pocket holster as my 642. In various types of shorts and pants, the 642 consistently draws smoothly, leaving its holster in the pocket. This is using a DeSantis Nemesis or Superfly, or an old Bianchi synthetic pocket holster.
The PM9 on the other hand frequently brings the holster out of the pocket when I draw. This happens with a DeSantis Nemesis, a cheapie Uncle Mike’s, and some other holsters that I can’t remember right now. The only pocket holster I have for the PM9 which will pretty consistently stay in the pocket when I draw the gun is a Galco; it has a hook that is designed to catch on the edge of the pocket. As long as I rock the holster sideways to catch the hook on the edge of the pocket, the holster will stay in the pocket as I draw the gun. Additionally, regardless of holster type, the back of the slide of the PM9 sometimes catches on the edge of the pocket, making for a fouled draw. These two draw issues are sufficient to keep me from trusting the PM9 as a pocket gun. Others may have a different experience.