GLOCK 20 Kaboom! Also, Xtreme Penetrator vs IIIA Armor

My GEN3 GLOCK 20 SF exploded while doing some IIIA body armor testing. After investigating it as thoroughly as possible, it does appear to have been ammo-caused. Could have been an overcharged round, could have been a loose bullet that got shoved down into the case when chambered [EDIT: Underwood examined the ammo and this is exactly what happened!], etc., but it was almost certainly something that was “off“ with the ammo. That said, I still have great respect for *and* trust in Underwood Ammo. I’ve shot hundreds of their rounds, including through this very gun, and have had zero issues whatsoever. They have an extremely good reputation, and for good reason. In fact, this may be the first ammo-caused problem I’ve heard of with somebody shooting Underwood. Not only that, but their customer service was *GREAT* and they stood behind this and are replacing everything that was damaged. They made the process very easy and were responsive, gracious, and apologetic. Additionally, this sort of incident has happened wi