Bundle up in PPE and whack one of those decapped duds with a hammer. Do the same with 15-20 fresh ones from the same lot. Report back.
I'm still shooting Remington 150s from a gun store closeout in 1982, given to me by my Stepfather around the time I started reloading ten years after that. Since I've had them they once spent eight years in an uninsulated metal storeroom in a cardboard box and still work great today. Not saying I would use them for BR competition now, but it really takes some bad storage conditions to turn primers into total duds.
Based on how the priming compound is handled and applied, I think it is highly unlikely that there is a bad mix, even running three shifts. Not impossible, but unlikely. Each lot is QCd. CCI isn't going to sacrifice safety for production after the experiences they've had in the past.
Gear