I am one of the guys that tumble (vibrate) before, but just a little to get the crud off the cases. Resize, deprime and then tumble (vibrate) to get them really clean (it also takes the lube off rifle cases).
That is the perfect time to inspect the cases because most of the problems, that were not caused by firing, will show up in resizing. I have a tool that I made from a nail. I put a long taper on it and threaded it to fit a RCBS handle and I use that to poke the occasional piece of media out of the primer pockets.
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