I have used empty cases as snap caps and never saw anything with them that looked different than any other empty case. Every time I shoot a cylinder of .454 Casull I run that cylinder of emptys 3-4 times dry firing.
That primer is missing the anvil or the case has a HUGE flash hole???
Please post more pictures.
For the message of the Cross is foolishness to those who are perishing, But to us who are being saved, It Is The Power Of God. 1Corinthians 1-18