So... my Spartan (9mm) is failing to extract once per magazine; basically the case remains partially in the chamber, causing the obvious issue with the nest round. I got an STI replacement extractor, but the problem remains; I'd say it's actually getting progressively worse / more common each time I go to the range. Gun has ~250 rounds so far. It happens both with factory ammo (AE) as well with my reloads (which all pass the plunk test). The case isn't "sticky" in the chamber by any means; I can easily push it out by inserting my .22 bore snake from the muzzle and the little brass weight will push the case out. That should rule out ammo-related issues, right? Could it be that even the 2nd extractor lacks proper tensions? Rough chamber? Anything else I can try before sending the gun back? I'm in Canuck-land, so shipping is a bit less straightforward than in the US. Thanks!