So, I shoot lots of 9mm every year and go on loading binges in the Spring and Fall since I've been banished to the garage for reloading. I had gone through about 20K of once fired Federal AE and HST brass with great results, but I don't have anymore of that left. So....I started on a bunch of mixed commercial brass and started having primer seating difficulties with most of the Winchester commercial brass (not their NATO mil loads). The primer pockets appeared to have the mil crimp on them. Am I imagining this or is this something you guys have observed already. It's a PITA for sure!