If you suspect the ejectors, and they can collect a lot of crud, work them back and forth with your thumb to see if you can duplicate the feel. The ejectors are not hard to service. No tools required. Push them in about half way, keeping an lifting (away from barrels) pressure on the forward end. You will seem them start to lift out of their slot in the monobloc. Usually it takes a little twist to get full clearance, but there you are. There is a spring and plunger under the ejector head and they are itching to get loose, so be mindful of them. Your first time taking them out, you might wear a light cotten glove on your pushing hand so sharp edges and springs don't nip at you. After you have done it once or twice it is a very casual exercise.
