Re: 9mm not ejecting case consistantly
From the sound of it your slide is not always coming all the way back. Double check the load, you may have accidently loaded up some a little weak. Or, you may have crud building up and preventing the slide's full motion range. If the action was dry, and/or dirty, that would cause it, too. It was dirtier than normal when using that load? Could you have mistakenly used a different powder? Clean the weapon very good, and check every aspect of your load. The culprit is more than likely one of them.