Some say yes and some say no!
I remove the spent primers and tumble all my brass in stainless pins, that cleaning action brings the brass to a like new condition. And the primer pockets are clean.
Using a vibrator machine cleans the out side but still leaves the inside and primer pockets dirty.
If you like them clean then clean them. I like to follow what Lyman says in their handloading manual, they have been in the loading business longer than anyone.
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