MR Saeed I guess I did misunderstood your reply my apologies !!!! I don't remember ever had a misfire on CCI's or Federal.

For what it's worth, I had non-fires on a batch of CCI primers. Would have been more than 10 years ago. Happened with only a couple of 100 count packs from a 1,000 primer brick. I know it wasn't simply a rifle issue because my son inadvertently loaded some ammo with these same primers and also had non-fires. But he kept re-cocking and firing and a few ignited after about 4 strikes. Since then I've gone to Federal primers which have been totally reliable for thousands of loads. Otherwise have only used a few Winchester and Remington primers but all good there.