Bought this new (to me) last fall and loaded a few hundred rounds of new brass. They all worked flawlessly until I neck sized the once fired brass. Now the fired brass sticks in the chamber, but is easily removed with knife blade or a cleaning rod. The cases show no signs of chamber damage, or over pressure. The brass is trimmed to minimum length. I have removed the extractors and inspected and cleaned them. nothing suspicious found there, either. I even primed 5 empty cases and fired them. They will stick too, but extract ok if not fired.
Not sure if I'm overlooking something. Anyone else seen this?

Thanks
Andy