I was at the range today and after shooting I was policing up my brass. I came across an unusual case. It says xtreme shock 9mm on the base. I have seen the ads for extreme shock ammo( ) but this thread is about the case, not the gimmicky ammo. This case is weird. It's not brass, nickel, aluminum or steel. I'm assuming that it's plated brass, I guess, but plated with what?
It is blueish in color and VERY smooth. It could be some sort of Titanium nitride coating or something but I just don't know. Anyone know what this is? I've never seen a case like this in 25 years of shooting.
On top is steel case wolf 7.62X39.
From left to right it's nickel plated, the case in question, aluminum and brass.
Sorry the pic isn't that great but the case is bluish-black. A little more blue in it than what the camera picked up.