Thanks for the replies, the curiosity in me means I'm going to have to try depriming slowly. Yes, I wear eye protection, and probably long johns under my clothes for this operation
And then they are headed for the trash, if I were to set the primers off outside the neighbors would drop bricks. My closest neighbor is a DA and they are a little nervous around loud noises.
Luckily I did not charge the case, when I felt the primer seat I could tell something wasn't right so inspected the case right away, so they are empty backwards-primed!
I really appreciate the advice!