I've also not had any problems with the mags apart from not caring for their chintzy design, and I've used sizes from .223 Rem to .300 Win Mag. That's not to say that there couldn't be a bad batch, and I'm sorry to hear that you have had such a bad experience with them. You're not the first in that regard, and the magazines seem to be available in fits and spurts, so I suspect a recall or redesign is unlikely. While most people would likely agree that the mags are not ready for prime time, I'd have at least said they were ready for early fringe.