I burned through 100 rounds of Norinco .223 on the weekend in my 11.5" AR15 - I had two serious ammo related stoppages.
In at least four of the rounds (from different boxes) the spent primers fell out of the brass during extraction, jamming the bolt once and the trigger mechanisim a second time. The other two primers may have bounced out on the ground, I didnt find them.
It is definitely a fair value for plinking, but I have never had this kind of trouble with any other factory ammo. Sure, every round went bang but it is unnacceptable to me for this to happen with factory ammo no matter how cheap it is.
I have also had trouble with very loose primer pockets when trying to reload the Norinco brass.
I think I'll be sticking to my reloads and North American brands in the future. YMMV!