Thought I'd share this, as i struggled with the concept of setting up FL sizing dies to bump the shoulder on fire formed brass.
By using a set of cheap feeler gauges, i run the ram of my press to the top of the stroke. Screw the FL die in while placing a feeler gauge starting with .008 in between the shell holder and the die. When the die makes contact with the guage tighten the lock ring on the die. Resize said brass and check to see if it chambers easily. If not use a smaller feeler gauge in increments of .002 until desired shoulder bump is achieved.
This works great, and saved me from spending money on a set of competition shell holders.
Hope this helps somebody, and any other insight would be appreciated!
By using a set of cheap feeler gauges, i run the ram of my press to the top of the stroke. Screw the FL die in while placing a feeler gauge starting with .008 in between the shell holder and the die. When the die makes contact with the guage tighten the lock ring on the die. Resize said brass and check to see if it chambers easily. If not use a smaller feeler gauge in increments of .002 until desired shoulder bump is achieved.
This works great, and saved me from spending money on a set of competition shell holders.
Hope this helps somebody, and any other insight would be appreciated!