Glock anomaly.

Thank you to all responders. Lots of good tips in these pages.
Would seem that brass for this pistol has to be sized as far down the case as one is able to insert it. Normal sizing depth I use for everything else won’t work. Anybody make a small base die for 9MM Glocks. I’m guessing this stuff needs to be size to NATO specifications.

My Dillon Die will adjust down far enough but it’s just as the ram wants to cam over.

That was an interesting video. Thanks.