That pic almost begs the question... is the barrel clear? Maybe you launched a squib round and the last three just piled on top? That's some severe indentation there, buddy. I've done some excessive tipping of the can whilst reloading, but I don't think I've matched that case deformation... yet.
Flip them over... what do the primers look like? I've over loaded ammo to the point that the line defining the primer and the case disappeared... The case was yellow and the primer area was silver, but you could NOT see any seam separating the two.
