Many years ago, I had the reloading shop of my dreams where I also cast and sized my own bullets and loaded 12 and 20 gauge shotgun shells. I sold the house and most of the gear and even though I still reloaded, it was on a small scale and I always had to "make do".
After I retired, a friend came over, we cleaned out my spare bedroom and I created my "bucket list" reloading area! Reloading is great for a retired man! I have two Dillon RL550B presses and my old faithful RCBS Rock Chucker with every conceivable accessory and do-dad. In all, I've owned 6 Dillon progressives depending on how you count. I rebuilt an older RL450 and completely converted it into an RL550B so I counted that one twice.....snicker.
I would start with a single stage press so you can learn how the dies operate and adjust. There's a lot going on in a progressive and it can be difficult to adjust unless you have an intimate knowledge of what each component is doing. Later, if you get a progressive, the single stage can still do many tasks for you
The main difference in progressives and single stage loaders is the batch process. In the progressive, you make one complete round at a time. In a single stage, you take 50-100 rounds and work each operation on the entire batch while storing them in loading blocks as a group. Single stage reloading can be very fast if you know how to do it.
If you feel comfortable with the dies, then move to a progressive. The Dillon "Square Deal" is for pistol rounds and the caliber conversions are expensive ($84 each) as the SD press uses proprietary, non standard dies which are included in the conversion. The press is simply too small for my gigantic hands but it does auto index the turret. I sold my SD press.
I have two Dillon RL 550B presses. One is set up for large primers and one for small primers. The 550B uses interchangeable tool heads so all of your dies can remain on the toolhead, properly adjusted if they are not being used. It takes about $100-120 to set up one toolhead and I have 11 of them!
RL550B presses have automatic primer feed, auto powder feed and auto loaded round eject. They don't auto index but I prefer it that way as it's easier to clear a problem.
I don't use the Dillon "strong base" mount and that lower mount allows me to load seated in a huge leather office chair...........and in air conditioned comfort!
The coolest part is that when I go to the range and shoot 120 9mm rounds, I put the 9mm toolhead in the press, change the shellplate (one bolt) set the powder measure and load 120 rounds. There's no need to load massive quantities of ammo. I just load what I need.
Other rounds that I don't load in quantity like 32 S&W long can still be done on the Rock Chucker.
In the 25-30 years that I've used RCBS and Dillon products, both companies have done handsprings to help me with any issue that came up. Two big thumbs up to both of them!
That's my "take" on it.
Flash