The factory crimp die is, a, BT said, a step up from the seating/crimp standard die as it produces more consistent ammo. And yes, it comes as a taper or roll crimp depending on the application.
Reading comprehension is becoming a lost art, sheesh.
George Orwell was a Prophet, not a novelist. Read 1984 and then look around you!
Old cat turd!
"Some men just need killing." ~ Clay Allison.
I am too old to fight but I can still pull a trigger. ~ Me