Hornady has morphed through several design changes in their FL bottle neck sizers. At first they had a smooth spindle held only by a collet nut and tapered collet. The elliptical sizer button was GLUED to the spindle. It could and would come loose when the sizer button was pulled OUT OF the case. The second design the expander was screwed to the spindle. The third generation, the zip spindle, has threads on the spindle shaft to help the collet to get a grip on the spindle, the old smooth spindles would slip too easily.
Maybe some day they will get it right. I have one of the old glued on buttons,(.308), the button is stuck in a brand new case the die is unusable. I'm going to send the whole shebang back to Hornady, I hope to get back a useable die.
The more people I meet, the more I love my dog
They're going to get their butts kicked over there this election. How come people can't spell and use words correctly?