Those links were really helpful, thank you. One question I have is I have heard people say not to bother using the 550 in conjunction with the case loader....why is that? One thing that is swaying me to the 650 is that I load mainly 10mm and if I get a progressive press I will load 1000-2000 rounds before switching to another caliber. My girlfriend shoots 38 and it would be nice to load up 500-1000 rounds of that so I can concentrate on making my ammo. I don't load a ton of different calibers as I really don't think reloading 9mm is cost effective although I could be wrong but on a single stage press it's not worth the time:money ratio. Another thing is it would be nice to add a bullet feeder down the road, can you use one with the 550?