What does a primer crimp look like and what are the good ways to remove it?
I was given a bunch of once-fired PMC .223 brass. They have Federal head stamps, so, I may use them in the distant future. I went ahead and resized a couple, to use for dummy rounds. Comparing the primer pocket to my Hornady brass; the PMC's appear to have something which looks like a sleeve, in the primer pocket. Is this the remnants of the primer crimp? Or am I seeing things? I've heard - but don't know the details of how - the crimps can be removed with my Lee primer pocket cleaning tool. Anyone know how this is best done....assuming what I'm seeing are primer crimps?

Thanks