I normally don't run steel case through anything but my AK either, but the DB had been so reliable with several different types of ammo, I guess I got a little cocky and decided to try the cheap stuff. Lesson learned! On the bright side, I made 50 rounds of ammo last through about 125 trigger pulls!Mine has been great, I never run steel cased ammo in anything except an AK, they're built for it. That is probably why you had the issue with TulAmmo, that stuff is junk. Not trying to be offensive and the DB aside, when will you guys start running quality ammo thru your expensive guns (This is directed at the AR guys running steel cased ammo thru 1000$ rifles.) Running steel cased ammo, is hard on guns and that stuff is usually dirty, which results in more failures and a longer cleaning session.