Groups
Most manufacturers divide their dies into groups. This is an indication of the size of the dies as well as the cartridge, the cost to manufacture the dies, and the number of dies in a die set.
- Groups A through J are 7/8"-14 thread. Virtually all reloading presses today use this thread.
- Groups K and L are 1"-14 thread and must be used with an adapter bushing in a press having a removable bushing in the press head.
- Group M are 1 1/4"-12 thread which fits most larger "C" and "O" presses with the top bushing removed. This group is our entire shotgun line. We also have a good selection of these dies in 1 1/4"-18 for use in our Champion Press.
- Group N is 1 1/4"-12 thread which fits most larger "C" and "O" presses with the top bushing removed.
- Groups O through U are 1 1/2"-12 thread which fit most 50 BMG loading presses.
- Groups V and W are 2"-12 thread and fit our Rock Crusher Press with a 2" top plate or bushing.
- Groups X and Y are 2 3/4"-12 thread and fit our Rock Crusher Press.