I have no experience with turret presses vs single stage presses and was wondering the advantages? Moving the turret around for every cartridge produced seems like a lot of work. BTW, the Redding turret press is priced at $319.99, the RCBS turret press is available for $239.99 from Midway.
The advantage to a turret press is that you can install a couple sets of dies and not have to install them each time you use them. many forls that load a number of different cartridges will buy extra turrets and populate them with dies. Then, the only have to swap out the turrets and shell holder to change cartridges.
Like single stage presses, turrets do one operation at a time on one case. With a single stage press, the most efficient mode of operation is to batch process each step. Resize all your fired cases, change the die, expand the case mouths on all the cases, clean (maybe), prime all your cases on or off the press, charge all the cases with powder, and then seat the bullets.
You can operate a turret the same way, you just do not have to swap dies in and out, just rotate the turret. Some folks leave a case in the press and perform a couple operations by rotation the turret before removing the case.
Historically, turret presses have been more expensive than single stage. I could never see enough, if any, improvement in efficiently of a turret press over a single stage so I'd rather use the difference in cost between the two presses to buy some other reloading goodies.
The new Lyman press at $200 makes it competitive with good single stage presses so it may make it an attractive choice.
Bottom line, though, the choice of turret or single stage is more what fits the individual's method of reloading.
Finally, The Lee Classic turret press is a different animal with it's auto indexing feature. While it still takes one stroke of the handle for each operation, the auto index feature moves the dies around after each operation. It speeds up the reloading processing a bit. Generally, with the lee Classic turret, folks will complete the reloading operation on a single case before moving to the next case as opposed to the batch processing that is done on a single stage press.
Clear as mud, I'm sure.