I made it to the range today. Here is what I discovered:
1:Installed the SR9 magazine well insert. 20 rounds of Win white box and 20 rounds of reloads ran perfectly.
2: Installed Glock 9 magazine well insert. Tested 8 different glock mags from variety of generations and a few non glock mags. Failure to eject at almost every round. (I think I had 4 or 5 that ejected properly, but next round failed)
3: I had an extra Glock 9 magazine well insert that I purchased from Brownells the night I order the PC carbine. (I didnt know that it came with one from the factory). I installed the new Glock 9 insert, and had zero failures with any of the glock magazines. I put about 300 rounds thru it using up the rest of the win white box and my reloads.
Overall very happy once I got it running correctly. Clearly the Glock magazine well insert that came with the rifle is defective. By eye, I cannot see anything different between the 2 glock well inserts, but clearly they are not identical.
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