Dillon Precision Super 1050 Mainspring and Bushing
Note: If you are replacing the mainspring (stock#12572) on a machine made prior to January,2016, the spring is now longer. This requires replacement of the spring bushing (stock#11335) as well, to accommodate the longer spring. To verify, measure your existing spring. The current spring is 10.5" long. The earlier spring was 8.5" long.
