Hi
Can a shell hang in the extractor if you lightly shake the breachblock outside of the gun?
The extractor have to hold a quite hard grip on the case to exctract it.
If not I think you should examine the tip of the extractor to see if its harmed.
If that is ok change the extractor spring.
Another possible source might also be a rough or to big chamber.
If the chamber is to rough it's need polishing but if its to big in diameter, it needs a new chamber(barrel)
Regards HÃ?Â¥kan
http://www.vapensmedjan.com