I've been reloading for about 30 years on a single stage press doing everything in batches. One step was to clean PPs. I knew when I went to a progressive recently I would not be able to do this without defeating the whole idea of a progressive press. Anyone that does not clean their primer pockets is welcome to it and I've been doing without on the progressive and it works fine. I just like having them clean, if possible.
I've seen pictures of brass cleaned in a US cleaner, both with and without the primer removed and it looked as if the cleaner did clean the PP somewhat even with the spent primer still in. I was curious to get some insight here.
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