The one on the right is very unusual for sure. I wonder if a batch may have been produced using small primers for some reason.
I have question about the one on the left. You say it has been on the uniformer. Just wondering how you are setting the depth? I have uniformed many k of brass and I can't ever remember one not removing all the carbon.

 

I have question about the one on the left. You say it has been on the uniformer. Just wondering how you are setting the depth? I have uniformed many k of brass and I can't ever remember one not removing all the carbon.

Sorry - pulled that one out of the wrong pile. I'll fix my post.ICONREDFAC

 

It's rare, but I saw a deprimed case that the depriming pin just popped the top off the primer and left the sidewalls of the primer cup in place..... I wonder if that happened in this instance

 

I believe this is probably the case in this instance!GI2

 

I think that so called small primer pockets were mfg. at one time for the 308 as well as other cartridges. Friend searched for months at one time to come up with small primer pockets in 7mm/08 and finally found a source for them. Reason given, was at the time the small primer pockets gave a more uniform burn than the large rifle primers??? I just kept shooting my ordinary brass with large primer pockets, but perhaps there is some justification to the idea?? You may have ended up with some of those.

 

Even though they are LC 11s? I had processed about 150 of them before I got to the one in question.