Weak brass - Igman .308 Winchester 147 Grain Full Metal Jacket Brass Cased Rifle Ammunition

The brass is weak. The ammo goes boom then it gets stuck. It will probably work in a bolt but for a semi auto it will not extract because the bolt rips the back end right off. My gun works just fine with Pmc and Winchester. Unless I got a bad batch, but beware. I examined the brass that was able to extract and I got lucky till the last round wouldn't remove. Like i said good for a bolt but bad for a semi.