wize fwom ya gwave!
Due to an excess of RL stuff, it was only a few weeks ago that I finally got the chance to send the pistol back to Glock.
They shipped it back the same day they received it, with a letter saying they replaced ejector, extractor, extractor spring, firing pin, striker, disconnector, and gave me a new replacement for the beat-up factory Glock mag I sent with the gun.
I took it to a range, fired 150 rounds, and got brass to face, again.
I asked around and it was suggested that I try Winchester "NATO" 9mm, which is apparently pretty stoutly loaded. With Winchester "NATO" 124gr ball ammo it lofts the spent brass over my head instead of smacking me in the face. It has been recommended that I shoot an additional 500-1000 rounds so that the ejector, extractor, and recoil spring can wear in and the ejection pattern can change to something more consistently away from my face. In the meantime, I've found that some production lots of Tula steelcase 9mm mimic the ejection pattern of the hot "NATO" ammo, so that is what I will be using for practice in the hopes of breaking the gun in and making it somewhat usable.
It's still annoying, and most of my preferred 9mm defensive loads are 147gr (Gold Dot, Ranger-T), which have a softer recoil impulse and are in this particular gun more prone to giving me brass-to-face.