Yesterday I had a nice experience. My 26.0 Varget 69gr Nosler load blew three out of five primers. No problems with this load a week before and no other signs of pressure. Round edges were still evident on primers and extraction was super easy with no bright spots on case heads. I was using CCI400s and in the past I have had a tiny blown pinhole in the center of the primer strike with those primers on occasion, but nothing like this....................It completely sheared the entire diameter of the firing pin strike out leaving the anvil in plain view. Interesting, to me at least. Guess I'll switch over to my Rem. 7-1/2s. I hate that because I have always found the CCI400s to shoot more accurately.