All of the foregoing is EXCELLENT advice. But, may I offer an alternative? I, too, have the both Lee products. I tried to "sneak up" on reloading and do it on the cheap. I started with the Lee Classic, then the Pro1000's (3 of them) and finally the Loadmaster. I still have them all, and just a bit of change invested. When I add it all up it is considerably more than a Dillon 550B. Nothing wrong with ANY of the Lee equipment. But if you can manage the funds and have the patience to troll FleaBay; go for a Dillon 550B (bypass the 450). Use the much less expensive Lee dies and you will be a happy thrifty re-loader.