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The four common primer pocket tools are;
Cleaners only brush out the burnt primer residue
Uniformers only cut the pocket to an even square depth, not the crimp
Reamers cut away the crimp at the outter top edge of pocket
Swagers force the crimp at the top larger thus removing it
Some people also use knives, drill bits, or deburring tools to remove primer pockets. I have the RCBS Swage die set and Lyman reamers. I usually ream primer crimps now on military brass, running the tool in a drill press and holding cases up to it.
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