Hello everyone, this is my first post.
I got myself a 22lr lcp a few months ago, and after the first time at the range, noticed the inability to manually extract an unfired round. I figured out that it would extract/eject if it was done upside down, and eventually pin-pointed the problem to the tilting barrel. As the slide moves back, the chamber end of the barrel begins to drop lower. As it does, the next round in the magazine begins to touch bottom of the ejecting cartridge. As this is happening the extractor actually loses it’s grip on the TOP edge of the case because it is moving too low. You end up with a half-extracted cartridge. When the gun is manually cycled upside down, the barrel doesn’t drop, so the extractor retains it’s grip.
If you lock the slide back, you will notice that there is a LOT of vertical play in the chamber end of the barrel. As an experiment, I figured I could put something under the barrel to keep it from dropping so low. Eventually, I settled on a piece of silicone o-ring. I took an o-ring that was made of 1/16” round stock and cut a piece about 1/4” long. I took the upper off the gun and flipped it over. I laid the piece of silicone in the barrel groove where the take-down pin goes. The gun needs to be reassembled upside down to keep the silicone piece in place, but once together, it can’t go anywhere. When cycling, it starts to get a little tight near the end the first few times, but smooths out. And, it works. The thing ejects perfectly, and the little piece of rubber has been in there for a few hundred rounds so far.
Unfortunately, and the reason I found this thread, I am having a problem with the slide locking back with rounds still in the magazine. What TwoBits says above may have some merit: stronger recoil spring. It seems like it’s the stronger ammo that does it, but sometimes it happens with weaker stuff too. 40 grain mini-mags are flawless, but 40 grain Aguila super extra do it 2 or 3 times per magazine. The Aguilas do it more than Interceptors or Velocitors. I don’t think that the bullet noses are hitting the tab on the slide stop.