Fits both 550 and 550B.
Includes Grade 8 mounting bolts.
Note… The Dillon RL550 cartridge chute and cart bin bracket that bolts to the Dillon Strong Mount will not work with this base plate.
This base plate will only work with the older Dillon RL550 aluminum cartridge chutes and cart bin bracket that are made for a flat bench mount, as shown.
Most reloaders prefer to work with their reloading presses at bench level for various reasons, contrary to elevated press mounts. The Dillon Aluminum bench level cart chute bracket (shown) is currently available in the Dillon catalog, or by calling Dillon.