Buy once cry once. Dillon.
I've never met anyone who bought a Dillon then bought something else...ever, that says something. Some others are fine but again, Dillon is the best.
The 550 is easy to load and learn on.....and it holds its value just fine. You
will go to a 650 in a year or two once the full value of reloading is fully revealed to you. You will even probably kick yourself for not starting with the 650 and swear you will encourage or outright demand of all your friend to not make the same mistake you did
and buy the 650 first from the beginning. But hey, it's OK we all start somewhere.
Fact is you'll be making the best 9mm ammo you've ever shot for 10cents a round and even better .223 for less than 20 cents a round. Oh, and Blackout, hallelujah...
And also remember this; their actually is no such thing as having too much powder or primers.