I have fired over 20,000 rounds of Wolf through my firearms, much of it in subguns and my M16, and have found it to be a great value. The one time I had a significant problem was extracting the old lacquer coated ammo from an AR-15 about 8 years ago. When I called them, they promptly sent a shipping label for me to return the ammo, and replaced it with ammo that worked flawlessly. The only other problem I've had with Wolf has been a dead primer (round doesn't ignite with a solid strike to the primer). I experience this about every 1,000 rounds. Not really a problem for me, since I only use it for cheap practice ammo. A couple years ago, I had several rounds of Tula 7.62x39 fail to ignite the powder. The primers went off, but the bullets stopped at the entrance of the chamber of my Russian SKS. When I ejected the cartridgse, the powder was clumped up and unburned in the case. I didn't reach out to Tulammo about it, but didn't buy any more until the case of 9mm that just worked fine for me. Since the price between Tulammo and Wolf is usually pretty close, and I've had such good luck with Wolf, I generally buy it when it's available for practice ammo.