A friend brought over ten rounds he had made, which had failed to fire. The primers showed a little tiny mark from where the firing pin had lightly struck the primer. We reset the primers deeper and then he tried to fire them again.
Uncle Buck, if you reset primers in loaded rounds, then I hereby present you with the year's Darwin Award!!
I'm sure you left out the part where you pulled the bullets, dumped the powder, then reseated the primers!!