After further review - I'm confident in the following:
1 - they are at the bottom of the pocket, fully seated, all the way in, done fucking right (because when I started reloading years ago I learned this one the hard way)... it's a solid go to, just assuming I'm retarded...
2 - I'm not buying another gun... lots of mystical slide milling or not... no...
3 - I clearly overstated the observation "they go bang in other guns" - here's the numbers after "testing" yesterday... I have had about 25 rounds not go bang on initial trigger pull (out of about 400) and then subsequent pulls (after putting back in mag to test - I know my gun is striker fired, I'm not full retard)... 1 of them ignited in a non-Sig brand branded pistol (and it was also not a CZ or Tang, so it's still my fault, right?) - the rest have not gone bang anywhere... OAL is fine... primers are "in"... logic dictates a batch of shitty primers... does it matter that the box says CC"eye" ?
4 - a large portion of the response was as rewarding as I expected it to be from anyone living in Canada... thanks, eh!
Basically - I think the box o primers is shite... it's not a p320 issue unless it has infected many other guns... which I don't think can happen... can it?
Post a pic of the primers on some of the rounds that failed to go bang.