Correct as above. I had reloaded my 308 brass several times before I got smart and started using a different method. I would use the same 20 over and over again until they got bad them would throw away. None of them did. My thought was that I would always have plenty in reserve if they did get screwed up. Then I adopted another was after I built my annealer. I would shoot all 200+ or so of the brass, then prep all 200+ ready for loading. So mine got mixed up in the bunch of once fired. I did not mark them and probably should have for a just see situation. Now I FL size and anneal after every firing because I have several 308's (2 Tikkas, 2 Rem 700's) Probably overkill, but it doesn't take long to do. I haven't noticed any loose primer pockets, accuracy difference, nothing when comparing the original 20 in comparison to the rest. If that means anything to your situation.