Easy enough for a manufacturer in a high volume operation to weigh the box and reject the light ones. It's done all the time in other automated industries.
Likely one of those things the bean counters have noted costs more to fix than their reputation needs fixed. We buy it regardless. Having to pay an employee to put one round in a box means having a whole bunch of it in a large variety, and it trying to be that batch or lot, too. Plus just making a mistake, similar to the clerks playing with it on the counter.
So, if the ammo makers tried to fix it, there would be errors made in that effort, and it's still the same problem as before.
Hence, they just ship it. I think I rather they did. Cheaper and less problems other than the one missing round.
Shrink wrapping the ammo won't help Kabooms either, it just guarantees their liability. And nobody is tampering with them anyway - as far as we know - just because the brass is the same, bullet, too. It's going to take a lot of effort to match things up, and the malicious would need to have skills and equipment that don't return much on the effort. A booby trapped box would deliver more bang for the buck. Or just shooting defenseless people, which at present is the more popular method. We have CCW to address that (unless you are working in a designated victim zone.)
I wouldn't make too much of it, there's already too much in the reply. It's an empty hole it the box, which for some of us, is exactly what we intend to do with it.
