A friend bought one, and after not getting it to function without having stove pipe type stoppages, he asked me to see if I could "fix" his Glock.
None of my attempts worked. The ammo choice was not a factor. Obvious from the start was that the recoil spring weight was too high. Cases that did eject fell at my feet. When I called Glock, described the problem, and provided serial number, the csr offered to send a prepaid shipping label. Now Glock has it. Serial prefix is AASU. Glock shipped this pistol to a distributor in March, 2014. I was asked about bullet grain weight. I had used S&B which has a 92 gr bullet.