What a mess, these things are like Mushroom Anchors in a fast river. The Bushing is a hole that brass is is pushed into when ammo with poor concentricity is going to be made. The collet die with the mandrel removed is a squeezing hole that crimps an entire neck with zero reference to bullet size and plenty of adjustment to get as much incorrect function of a die as possible by simply not following instructions.
Progress haters and negative innovation critics love messing up inventions that work by ignoring and falsely refuting instructions to give poor results, they just love Mushroom Anchors in a fast river too.
Gary