barreledaction,
be careful not to confuse the turret press with the progressive press. The turret can be used (to some extent) as a progressive, but you don't have to do it that way... on some anyway. The neat thing about a turret press is that you don't have to unscrew dies all the time, just swap to the head for the caliber, and youre done.
take loading a 7mm rem mag for instance...
Ill batch load all of the steps up untill ive got primed brass. Then a case goes into the shell holder. One stroke bumps the shoulder back, turn turret, check headspace with redding instant indicator, turn, neck size (those two happen while the powder scale is stabalizing.... or being trickled depending on batch size) turn, drop powder, turn, seat bullet, turn, check bullet depth with redding instant indicator, and then place in box, or throw it on the neco for the first few rounds and make sure everything is looking good. If you wanted to, you could substitute a belt collet for one of the redding instant indicators.or a crimper... or expander for lead bullets.... or a power case trimmer.... the options just go on and on...
it sounds like a long process, but if you are loading a bunch of ammo, and you want to weigh charges (or have an automatic powder despensor) it flies compared to batch loading.
oh, back on topic... I have never used the Harrells, but their powder measures are superb!