BLE, just to prove how old I am, I used to load shotshells with the old Rem 57 primers. I have never had ANY old ammunition fail, not even any of my handloads. I recently found a couple of boxes of 38 Special, 165 gr hard cast bullets (my castings), light Red Dot target loads, that I loaded in the 70's. Still shoot just fine and accurate as ever. I don't have my casting stuff anymore, but after finding and shooting these old rounds, I wish I did. They are as accurate as anything I am loading today.
Chief
Chief