Went out to put a couple hundred rounds through an Adams Arms piston kit I just unstalled on a backup AR. About 60-70 rounds in, I had a failure to extract. Ripped the rim off the steel cased, 55 grain TulAmmo I bought a few months ago when it was all I could find. I have several hundred rounds of this crap now. I had to punch it out with a cleaning rod, and I actually broke the cleaning rod... It was stuck in there pretty good. I have listened to all the online "experts" about how the new Tula was better than the old, and how the rims WON'T rip off, and the casings WON'T get stuck in the chamber. Well, the proof is in the pudding. Maybe the new piston kit cause the bolt carrier to fly back too quickly, maybe the carrier tilted a little... But that casing was lodged in there fully and did not want to come out. Garbage.