So i got a Keltec sub2000 glock 17 version in 9mm and hit the range today. Was using some reloads i got in a 5trade probably 5 years ago roughly from CNC cartridge which according to box is out of Macedonia, IL. Ran 3 full 17 round mags (pmag) and was running a factory glock 30 round mag when on the 29th round i had 1 blow up out the side. Is this an Overpressure/double charge load? Theres also a few other spent cases (3 total) that have a mark on them, 1/3 of a circle mark, that kind of matches the feed ramp. Had zero issues until this 1 blew the side of case out. What say you INGO? I've never had this happen before and it did give me a decent little scare. Anyone hear of this company before? Also have a piece of plastic with the messed up round. I cant visually see where it came from, but haven't done a complete tear down of the weapon yet.