Berdan Primed

Took a pile of spent shells to my friend Jack, who reloads ammo. He wants to know if they are Berdan primed or not. Looking into the shell I can see nothing, just a black pit of despair. Take a flash picture looking into the shell from 3 feet away, get a 16 megapixel image. On the camera's screen the shell is a black dot, but if you mash the right buttons enough, you can pan and zoom until you can actually see the bottom of the shell, et voila! Two holes confirming that it is Berdan primed.