Well, finally got the ejector and extractor installed, and yeah, the gun's much more reliable now. Gunsmith fired 3 mags and had no issue, I fired 3 mags and had one light primer strike (most likely ammo related) and one failure to feed. The other rounds all ran fine with Federal HST hollow points. I did move the mag that had the FTF to my range mag only pile but this was significantly better than what I was getting before which was a malfunction every magazine. This is probably the best I can get and I'll always have my pistol with me so this is good enough. As long as I can get some mags that consistently feed reliably, I'll use those mags as carry mags for a backpack gun. Whew, though, it was quite a trip getting everything to work but at least it finally does work. I don't know exactly what Velocity did to my gun, but while it didn't work with Winchester Ranger T, it did work with Federal HST (which seems to have a rounder profile) and the new extractor and ejector do eject reliably now. Didn't get a single failure to eject. Wonder if anyone else ever had these issues before and if the ejector and extractor are things that need to be regularly replaced. Or if I just happened to get bad parts that were just hidden for so long due to the feeding issues.
Either way, glad it's finally done.