@Joe, glad all is well. Unfortunately, both I and a friend have both found ourselves in that situation. Based on my experience and your info, @Kirk is right…primer alone, no powder. Had that happen to one of my 10mm\’s in competition.
Good luck and pay attention. Have my reloaders setup now so I can see in the case as I seat a bullet. Also spent the money on some LED lighting for inside the turret area. WELL worth it!
All the best.