butlersrangers wrote on May 19^th, 2017 at 11:59am:

Wow! I would have stopped after ruining One case, that way. Your Case Mouths look heavily crimped into Bullet Cannelure. I suspect that may be the actual problem. An inertia 'puller' would be worth a try. (I'd start with the five ruined ones)!

We are kinda doubling up on this this threat but:
I was just trying to bump the bullet back just enough to allow for removal. 
What I did find on the two that removed was excessive corrosion,  No surprise, I'm sure.
No sure a kinetic puller would do the job.
Vic