Centurion UC-9 slo-motion failure

On the fourth shot, no brass will appear to eject. This would have been a stovepipe if not for the large cutout on the semi-auto Uzi/UC-9 bolt. When the final round is fired and attempting to eject, the case kicks the stuck brass out (notice how far it flies), but quickly loses energy and remains in the path of the bolt and causes a failure to feed when stripping the next round off of the magazine (new round is headed into the chamber, but the stuck case stops the bolt from moving it all the way forward). The first attempt at immediate action clears an empty case, but since there was a round partially stripped off the magazine, a double-feed occurs.

Going to try some NATO-spec 24gr ammo and see how things go.