In any powder measurer the cylindrical powder will be less accurate than spherical powders. With that said, you can get fairly accurate loads with progressive loading with either powders. Seldom will your loads be as accurate as hand-weighed charges.
With some progressive presses you can use whatever powder measurer you want. With others (Dillon) you will use their brand. They are all pretty darn good if you're loading fodder which is for use in an application where top accuracy isn't required (Pistol, shotgun and or plinking stuff).
I load most of my ammo on a progressive press but all hunting and serious target anmmo is loaded one at a time and charged hand -weighed.
I hope that helps,
Zeke