Actually it's a three die set. You have to reduce the neck size gradually to minimize work hardening of the brass. I load these shells for a guy in Rochester, New York, and his gun is pretty darn accurate with them.
Form Die #1 begins the sizing, form die #2 continues the sizing, Form die #3 is a trim die that the extra material sticks out the top of to be filed off.
At this point, you proceed with a standard two die full length sizing set which decaps and finsh forms then seats and crimps. A lot of steps, alot of dies, and alot of money. Maybe it's not so crazy to just buy cartridges for this caliber after all......