That's a good question.....
From this video, SAAMI would likely say it's safe to have as many primers as you like as long as they're in the brass. They never say it, but they do imply it.
Such a waste of ammo... but fascinating video.
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"They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety."
-- Benjamin Franklin
lib·er·ty
/ˈlibərdē/
noun
1.
the state of being free within society from oppressive restrictions imposed by authority on one's way of life, behavior, or political views