More and more frequently my Limcat 9 major gets a fired shell locked either all the way in the chamber or occasionally slightly out. The slide continues back and tries to feed next round. When slide closes on case it grips it really well so it does not seem to be the extractor. It takes a steel rod to get spent brass out of chamber. The brass is swelled above the rim for a 1/4" I have down loaded to below major and it is still occurring, worse with foreign brass and Freedom does it 50% of the time. Primers are not flattened with down loaded rounds except some of the swelled ones. Any ideas?