Stock II 10mm 2017 production around 400 rounds fired.
Breech face has been chamfered and polished. Feed ramp has also been polished.
Randomly throughout a mag a round will eject and the next round will not feed. A slight pull and release on on slide and it will chamber. This mainly happens with gold dots ,but has occurred with fmj's also. All factory ammo and it happens with multiple mags. Sometimes the round is not straight but slightly canted towards the ejection port (possibly caused by the slide stop ?)
All mag springs are stock (possible weak springs?)
it has a conefit guide rod, 20lb Wolff recoil spring, 18lb hammer spring and a EGW FBFPS. I have also trimmed the ejector.
I have searched other threads to try to eliminate the most common issues.