I am thinking of getting into reloading as a retired and bored hobby. I like the Dillon Square Deal B as it is rated very good quality and ease of use. I also like the progressive action. I really don't want a single stage press. I am thinking of reloading 9, 38spl, 40, and 45. All just pistol ammo. People are saying if doing more than one caliber then get the 550 Dillon. Would that really save me much money over getting the Square B? Does the 550 come with some set up to do various calibers? I know the SB only comes set up for one caliber? I would still have to buy the different caliber dies for either model wouldn't I? From a you tube video I saw it isn't hard to change out the SB for another caliber in like 10 minutes. I do have more time than money available. Another question is are the supplies more available now that the big buy has subsided? On that note is there a better vendor to buy all the supplies from? I see there are many experienced loaders here. Anyone looking to sell a good used Dillon? Appreciate the help.