And who can argue with that?
I was shooting with a guy last weekend who said the FiveseveN pistol really screws up the case shoulder. The PS90 is chambered fine, but the pistol causes the shoulder to extend (bump) and becomes practically useless in a standard die. He said they make a special die just to re-align the shoulder for pistol-fired cases, but it cost him $300, so I suspect it’s a custom die.
I have a couple hundred 5.7x28 cases, but I’ve never reloaded them myself.