Has anyone done any upgrades to the 366 machine.i find the primer system to be difficult to use with the slotted dial that drops the primers and would like to see a metal starter crimp die and a metal taper roll die.Anyone making after-market items?
If by taper roll die, you mean the final die in the station, Hornady replaced the tapered die with a straight-sided die several years ago. The old one was steel, and the new one is aluminum.
They did this to help eliminate the wrinkling of the new AA sidewalls, along with re-adjusting the length of the die.
Also, the primer was updated at about the same time, or a bit earlier, and I found this new one works more consistent than original. The new one has a red spring that controls the pressure better when the primer is seated.
Hornady is very good to work with, and if you explain your problems to them, I am sure they can help.