I've always had relatively good luck until I got a brick a couple years ago. It was branded Federal, in a blue box, with a bunch of little boxes in it. The first box I broke into had a few rounds that just went piff, and you could watch the bullet pop out of the barrel and hit the ground 10-15 feet ahead. I'd say every 5th round or so. So I chucked that and tried another box, same thing. Ended up throwing out the rest of the brick. I knew to pay attention, but if one of my kids was shooting and wasn't, and ended up with an obstructed barrel, that could be bad. Probably not as violent as a larger centerfire, but dangerous nonetheless.