Before I started handloading, I bought a bunch (probably 3-4k) of 9mm handloads from a friend who had inherited them when his dad passed away.
I knew absoulutely nothing, except that the ammo was a give away price (or so I thought). The wife put a few boxes downrange without any trouble, and then one round locked up her XD solid. I believe it was a marginally high primer, but it took some serious beating by the range's smith to get it free.
Seven or eight years later, we are down to our last couple hundred rounds of that ammo, and she no longer owns the XD. Not sure when I will burn it off, but I will give each round a visual once-over.