Slight bend in the thread
I've had it apart doing things like ambi safetys, cleaning and stuff that has required me to remove the grip safety, so I suspect I'm the culprit. I'll check those items scorch mentioned. I wonder if having one of those spring ends under or on top of something it shouldn't be could cause it. This has been my project gun and it's taught me a lot. This will be one more thing.
Harry, in the past you've advocated relieving the chamber of match barrels. This one (Kart) has a feature I'd like to cure and that is that when the chamber gets very dirty the gun sometimes doesn't go fully into battery, without a shove. Is that the relieving you talked about, to prevent this embarrasing problem? If so, does it affect the "match" chamber benefits, or perhaps is the match chamber just for "matches" and not for duty?