As anyone who knows me will tell you, I have a hard time walking past brass, even 9mm, so I've got a wide array of mixed brass I've been loading. I've noticed that almost invariably, Extreme brass will trigger the Dillon powder checker on the high side. That brass gets deprimed and chucked into the junk brass box.
Maybe I'm being overly cautious, but I'm not exactly hurting for 9mm brass right now due to my zeal for all that glittery range brass.
How does Extreme load for you?