Primer Pocket Problems
I finally had enough used, mixed range 223 brass saved up that I decided to try swaging primer pockets with a Hornady Single Stage swaging tool.
49 of the first 50 I tried to add primers to went fine. On one, the primer went in but I noticed something off. Upon further inspection, there was an a metal half moon sticking up along the edge of the primer pocket. I peeled it off easily and it looked to be silver (the color of the primer vs the brass).
When I decapped the brass, the primer looked un damaged.