[Kayser]

Don't start with a progressive. You are asking for trouble if you don't spend a large chunk of time doing things round by round to understand the process and get a feel for where things can go wrong. Start with a single stage like a Lee, or if you must have the feel of high production get the Lee Classic Turret which functions in single-stage mode but can be toggled into pseudo-progressive mode.

Progressives are complex, and they add a layer of obfuscation-of-process that is dangerous for someone who hasn't experienced the basics yet.

Start simple. Keep the blood on the inside.