Originally Posted by gdmoody
I have searched all of the head stamp web sites that I know (and a couple I didn't know about) and I cannot find any reference to the head stamp using the numbers 603. I did find 602 and 604 but not 603, oh well, but as every one else has said, definitely berdan primed.
I did the same thing and learned more about the 9mm case than I really wanted to know. Like you I found references to the numbers 602 and 604, but not 603.