Never had a problem in any of mine, nor the 7.62's, nor 9mm's, nor any number of tons of metric equivalents for pistols, rifles, and shotguns.. As a matter of fact, early Norma ammo in many other calibers was hotter than American SAAMI specs. It never hurt a thing in my house, and I shot 5 or 6 metric calibers back then. I don't know where this BS keeps coming from? If there was a problem, don't you think the lawyer-scared manufacturers would have warned you by now? Shoot away.