Primer Question

I'm sure this isnt a new question but, I have a few round that I need to pull apart due errors on my part , plus a few misfeds. Can I just run the the emptied brass threw my deprimer to take the unspent primer out? I also have one that the primer is in upside down,will depriming it set off the primer? These are small pistol primers in 9mm rounds.

Thanks

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