More accurate round for rifle. Not sure about pistol ,don't shoot far enough distance to tell if it makes a difference. A uniformer is a tool that actually scraps the metal out of primer pocket making it square and flat surface for the primer to sit in. Now as for uniforming the pocket- I believe there was someone in here once that had a post showing results that it is not always the best thing to do.
I think it was something to do with the residue in pocket helps seal primer ignition???. Maybe he will chime in with that article again.
End results will be what works best for you. Load some both ways and see what your pistol likes.
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