5 boxes in a row could all be from the same batch, and that problem with the CB caps and shorts isn't an ammo problem it's a packaging problem. Looks like one batch got the wrong labels on the boxes.
You should let CCI know about it (give them the lot# off one/all of the boxes.
They will eagerly fix a problem, if they know there is a problem (and you have to assume they don't know, otherwise, it wouldn't have left the factory).
The 7-9% failure rate, is an ammo problem, and they need to know about that too! Was it 7-9% total failure? or was it 7-9% failed to fire, and then did fire when the rim was restruck in a different place? (You did reposition and try to fire the dud rounds, didn't you?) These are similar but different problems, and CCI needs to know.
That high a rate of failure is unacceptable.
One does need to be sure the failure rate is the ammo, and not your gun, though. Was shooting one time with a friend, and his S&W M41 (a fine gun) was having multiple duds, with some CCI Blazer .22LR. Nothing wrong with the gun, or with the ammo, which all fired perfectly through other guns (including the rnds that didn't fire in the model 41). It was the combination of the ammo sensitivity and the relatively light firing pin strike of that particular gun that caused the issue.
If possible, see if that same failure rate happens when the ammo is fired in a different gun(s). If it is consistent, then it is an ammo problem, and CCI needs to know about it.
Even if you can't check with another gun, call CCI anyway, and let them know what's going on. I'm willing to bet they'll be glad you let them know.
You might be, too!