I had a brick of cci small pistol primers that I had the same problem with! If you search the forum you will find my thread about it and cci’s response! They told me my guns were broken and I didn’t know how to reload properly! Anything but the primers! There senior tech told , and I “cci has never had an issue with any of there products. There primers are always perfect “! Three different hand guns all failed to go bang. Absolutely no problem with the hand guns when I use any other primers! I thought maybe they miss labeled small rifle primers for small pistol primers. Maybe even their military primers labeled as small pistol primers. After seeing that you had the same issue with L.R. Primers who know! I stopped using cci primers!
Anyway, I feel your pain! I had to break down 1,000 rounds of pistol ammo! 9x10, 9x19, and 39 special. What a pain in the rear end!
Good luck!