Here's a video showing how it's done.
Amazing Manufacturing Process for Bullets, Ammunition and Projectiles - Machines & Modern Technology
Funny that you mentioned your Dillon 450, I was thinking, dang that's even better than a Dillon press, lolJust a guess but I'm thinking that more than 1 person sets up that line.
Looks a little more complicated than my Dillon 450.
Youngest son is a robotics tech, for a company that builds & services robotic lines for the big 3.
They have different techs that service an assembly line he does the software commands for the machines.