jams with pics ( an appeal to my Kahr brothers and sisters )

[olympicmotorcars]

Is this the same ammo that you have been using? I have found that shorter ammo gets released too early, before the bullet nose is in the chamber, it sometimes leaves the cartridge nose up.

My Glock 27 has a lot softer extractor than my PM40,

The extractor is a good possibility too.
To help evaluate your extractor try pushing loose rounds into the empty slide from below.

Yes , same ammo , 165 grain Gold Dot

[olympicmotorcars]

Check the magazine feed lips. They may need adjusting. Use a pair of round nose pliers and turn them in just a bit. A very little adjustment goes a long way. You can slowly close the slide by hand with the recoil spring removed and watch the action.

Another good idea, I will try this.

[olympicmotorcars]

I have noticed the PPS will not chamber a round unless you lock the slide back then release it to slam a round home. It always jams if you try to slowly rack it by hand. Sort of like my PM 40 did when it was new. The PPS has always done this since new and I just assumed it was normal for it.