That's some pretty scarey stuff! Have you given any thought to contacting the manufacturer? If you still have it, save the box, and give them the lot number. Since their business (and a possible lawsuit) is on the line, I'll bet your call would be well-received.
Another possibility here, any chance your ammo was exposed to WD-40 or another oil or solvent? WD-40 is notorious for penetrating primers and ruining them.
TFL Members are ambassadors to the world for firearm owners. What kind of ambassador does your post make you?
I train in earnest, to do the things that I pray in earnest, I'll never have to do.