Walther PPK issues
I bought my PPK around 5 years ago after shooting one at the Try and Buy day at the local range. The store owner begged me not to buy it as they were notorious for stovepiping. Mine is one of the American made ones before Smith moved the plant.
A few things were lousy-trigger pull was too heavy, racking the slide was difficult, and the gun stovepiped every 20 rounds or so no matter what ammo I used. A call to Wolff got me the lightest springs they said would work, which lightened the triggerpull and made it easier to rack the slide.
I engaged in a little head scratching about the stovepiping problem. first I polished the feed ramp and the chamber (barrel) to allow a round to enter and exit easier. That helped a little, but didn't eliminate the stovepiping. Then I carefully tapered, contoured, and polished the leading edge of the extractor, figuring that it was having a hard time climbing over the rim of the cartridge. This made all the difference in the world.
The stock plastic grips cracked after 6 months, so I bought Hogue wood ones.
Later, an S+W rep told me that all PPKs give grief until you run 500 hot rounds through them.
The gun is very accurate for it's size.