This is an interesting story. I found about 100 factory primed 22-250 cases when I was looking through the brass at a junk yard. The brass was very dirty and I knew I would have to tumble the devil out of it but it looked like it would clean up. When I got it home I saw it would take more than just a tumble. I knew I would loose the primer but I had to soak it in vinegar to get the black off. I have been using 50-50 vinegar for years and it has worked well for me. So I soaked them about 1/2 an hour and tumbled them. They came out looking like they just left the factory. I was about to deprime them when I had a thought. I hate to deprime live primers so I thought I would run them through the gun to make sure they were dead. To my surprise I did 10 of them and they all went bang. The vinegar had no effect on them and I now have they loaded. I would have never believed the vinegar would not effect the primer.
