I'm on the wagon with the rest of the guys, Milbrass is high quality 'Range' brass that with a little work can be 'Match' grade brass.
I buy it 2,500 to 3,000 pounds at a time.
Hand cutting primer crimps is a little time consuming and can be hard on the hands,
BUT,
You only do it ONCE, from then on throughout the life of the brass it's trouble free high quality cartridge brass that will serve you well.
If you are only doing 100 at a time, then hand twist tool,
If you sit down and do 500 or 1,000 at a time, spend the money on a bench mounted swaging tool (under $100 most times), makes the job MUCH easier.
*IF* you get into several thousand at a time, get a progressive press that supports auto swaging (like Dillon Super 1050)
No sense in buying more than you need, $20 to $2,000 depending on volume done...
I would stay away from 'Case Processing Centers', the motorized contraptions that have several rotating tools hanging out in space.
It's not the rotating tools, it's the fact there are no guides (other than your fingers/eyeball) to keep the brass true & square on the cutting tools.
Oddball, out of square cuts are common...
When you reach the point of 'Needing' something like that, there are better ways of doing all functions that 'All In One' unit does.