Lot# BKL344G bit me this morning. Etched the bolt face on a 308 with a moderate load of IMR4895. I don't think that pressure was an issue as I was running them over a chrono at the time and under 2700fps with a 150gr bullet. I had already fired 500 from this brick with no problems so this was an unpleasant surprise. I have about 10k more WLRs in Lots from B, E, G and Y so I guess I'll be making the call. WLRs had been my go to primer for years and never a hiccup.