You want to inspect all the ammo before you load your firearm. Have bought factory fresh ammo before to find their quality control definitely missed some rounds that should never have left the factory.
^ This, yet again, as with
jfmorris, too.
I cannot emphasize enough just how much even paying just *slight* attention to loading your magazine or gun can help the shooter avoid what could potentially be catastrophic.
I've also had factory-new ammo from reputable manufacturers such as Speer actually be so physically deformed as they came out of the box that they would not even fit in the magazine, forgetting the chamber altogether.
Problems can occur: modern manufacturing practices, tolerances and QA/QC means that these events are unlikely, but they're still possibilities, so any time you load "serious use" ammo, at the very least, I *implore* you to please at least give it a quick visual and tactile once-over.
I've gone through maybe 150,000 round of factory-new 9x19 over the last 10 years, both range-fodder and premium defensive ammo, and while I can only count on one hand the instances where I've come across such problematic cartridges myself, that's still five fingers too many.
I usually stuff my pistol mags by hand, without the assistance of a loading device, but even with something like the MagLula UpLula, I find that I still have more than sufficient time to physically look at each round as it is being fed into the chute, and that my fingers will pick up irregularities. I'm honestly just as lazy as the next dude
, and in a class where I'm going through 500 to 1K rounds a day, I will readily admit that I am not going to take the time to physically detail-inspect and "plunk test" each round as I would my defensive ammo. But even going as fast as I can, I find that I won't out-pace myself, and that the only way I could potentially miss something is if I chose not to pay attention to the act, at-all. So slow down just a hair, and hopefully save yourself and your shooting partners a lot of grief!