Unfortunately I bought 1,000 rounds of this stuff.
About 5% of the time, the case fails to extract from the chamber. The round went off, but the spent case doesn't come out. The slide manages to cycle back and tries to feed a new round. Classic double feed.
Hard to fix though. After locking the slide back and removing the mag, I'll let the slide back forward so the extractor grabs the spent case again. But at this point you can't pull the slide back. Using all my strength I couldn't get the slide back. Sometimes I can clear it by pulling the slide back. Sometimes I have to field strip the gun and use a jag (from the muzzle end) to knock the case out.
Weird, because this Barnaul ammo looks very similar to 1,500 round of LCW I ran through the same gun. Not a single problem with the 1,500 rounds of LCW. So far I've shot around 200 rounds of this Barnaul stuff and probably had 5-6 Failures to Extract.
All other ammo I've tried in the same gun hasn't had any problems.
Definitely won't be buying any more.