I am no expert, but check the ejector, too see if it is broken or shortened. If you can clean the chamber till it shines and last check the extractor to see if it is chipped or broken or very dirty. If you have already tried these remedies I am sorry for the late advice. That is the extant of my failure to eject and feed knowledge. Good luck with the pistol, from what I read about the convert model they are a pistol worth having.
"A gentleman will seldom, if ever, need a pistol. However, if he does, he needs it very badly!" -- Sir Winston Churchill