If I had any of that same lot of ammo I would be weighing each round to guarantee the presence of a powder charge.
Observation/question: How did we get to calling a bullet stuck in a barrel a "squib"? Historically a squib load was a low velocity target/plinking load, and a bullet stuck in the barrel was, well, a bullet stuck in the barrel. Odd how erroneous usage of words worms its way into the common vernacular.