ZQI Ammo issue

[Sousuke]

Anyone else have issues with ZQI 556 (62 grain)?

I bought a box to try and I'm getting all sorts of malfunctions, FTF, bolt over case, fails to hold open etc.

Is this stuff a bit weak?

For comparison, I also shot american eagle 556 55gr. and 62gr. as well as PMC Bronze .223 before and after (same range trip) and they all ran flawlessly.

PMC Bronze is generally on the light side, so if it runs smooth but the ZQI can't run the bolt i'm left wondering if its just bad ammo.

[NYT]

i shoot it almost exclusively now out of my rifles. both the 762 and 556 stuff and have yet to get a failure in over 2500 rounds of both.

[LeadFarmer74]

I just shot that same ammo over the weekend and it works fine in all my guns.

[deadcoyote]

I've shot several hundred rounds out of a BCM carbine. Never had any issues, but then I've never had any issues with any ammo out of that gun. I've never tried it in my RRA AR.

[Sousuke]

Thanks for the feedback (just realized i posted this in manual not gas operated by mistake)