Originally Posted by jdlii

My GS got it apart and diagnosed the problem as a burr on the ejector. Apparently the burr was not allowing the slide to move completely forward.
He is going to "polish" the burr down and hopefully this this resolve the issue.

The root cause, according to our conversation, is most likely the Winchester steel cased "Range" ammunition that I shot the first and only time I fired the Mod. 39. The pistol definitely doesn't like this ammo and out of the 25 rounds that I fired, it failed to extract and eject over 30% of the time. No more steel ammo of any kind for this pistol and believe it or not, I bought this ammo to shoot in a CZ Mod. 75 that I sold. Otherwise my practice is never to shoot steel cased ammo in any firearm that I own.

Live and learn.