Question for the experts ....

[dw1911]

Originally Posted by Sheepdog

I'm no expert. I would say that your extractor is to tight and hanging on to the case to long. when the slide closes it is bouncing the case off the area in front of the ejection port throwing it backwards. Duty treatment will not chip, it is in the metal. Duty Coat will chip.

This /\ /\ /\ /\ /\ It will likely go away after break in. I have seen it 1st hand. Some ammo will do it and others won't due to different loads & cases.
Personally, I would shoot the heck out of it and see what happens.