Appears to me like a light strike. Also, with the experience I mentioned above, the primers that didn't ignite for a friend were Fed 210's. I know that Feds have a reputation for being more sensitive, but I'm not so sure......
Years ago I had about half a box of remington 30-30 ammo that didn't fire after sitting in a cabinet in a non-airconditioned house for a few years. Later I had several misfires out of CCI-250 primers in handloads. I've never had a misfire out of a federal primer. In my hunting ammo I only use federals now, I don't trust the others. However, I have shot about a gazillion CCI's at prairie dogs.
