I've used that very hull in loading 12 Ga steel shotshells, it's a great hull and roll crimps nicely.....it even star crimps quite well too!.....

Yes...no press is necessary. Install the recipe amount of powder and the wad/projectile and crimp.....you don't even need the holding device as it's quite easy to hold in the hand. I use a drill press and hold the hull in my fingers. 150-200 RPM is fine....don't run too fast.....you might lose a couple getting the hang of it but probably not more than one or two.....

An overshot card is required for shot.....use one only if the recipe calls for it. Ballistic Products makes a clear plastic wad that is cute....."see thru"