What are you calling ‘stuck’? Stovepipe, actually stuck in the chamber, flipped backwards in the action? My first wag is your extractor, without the muscle of the magazine spring to help eject the case maybe? Another thought would be the difference in recoil between a loaded and an mty pistol is messing with the extraction. The lighter the gun is the snappier the recoil. Do you shoot duelist or modern? It shoots the top 5-6 rds fine and then acts up and it’s happened with multiple mags, its a gun thing not a bullet thing. But all this is a wag. Sure someone smarter will be along shortly.