Case head separation or sizing die marks?

Case head separation and what it looks like before it happens

Case head separation or sizing die marks?

Handloading - Wikipedia

Case head separation or sizing die marks?

Case head separation or sizing die marks?

Lyman Flash Hole Uniformer : Sporting Goods : Sports

Canon EOS R6 Mark II in-depth review: Digital Photography Review

Tokarev TT-33, 7.62mm Magazine Clip - Handguns of the World

Case Head Separation??

Case head separation or something else? : r/reloading