On a recent batch of once fired Federal .223 brass I noticed what appears to be a sleeve or insert in the primer pocket.
Here's what I'm talking about. On the left is an older Federal case, on the right one of the new ones.
Without primer
With fired primer
Different angle on the new primer.
So what are we looking at here?
Here's what I'm talking about. On the left is an older Federal case, on the right one of the new ones.
Without primer
With fired primer
Different angle on the new primer.
So what are we looking at here?


















































