I have a Colt Combat Commander. I put a dummy cartridge in a magazine, insert the magazine and release the slide. Then I draw the slide back slowly to watch the action. The dummy cartridge is withdrawn from the barrel, but it sags as soon as it is clear of the barrel. I think the extractor should be holding the dummy cartridge firmly against the breech plate to allow proper ejection, but it does not. Does this sound like an extractor problem and, if so, what is the remedy?