The Dillon RL550C is the most versatile reloading machine in the Dillon Precision Products line. It will accommodate the widest variety of cartridges from 32 ACP up to 338 Lapua, 416 Rigby, and 460 Weatherby.
It has a manually indexed shellplate making it easier to master the various steps of reloading. Manual indexing also gives the operator greater control over each individual step in the loading process. Caliber changes are simple and require fewer parts than other machines which makes it less expensive to convert to another cartridge.
The "C" designation indicates a significant revision from the original design. The upper link arm pivot pins are now threaded in place, and have a grease groove around the pin that connects with a lube hole on the end of the pin. You can use a needle fitting on a grease gun to lubricate the upper pivot pins now.