I have a Dillon 550 progressive press and a Herters C-type press. I load .45ACP, .308 Winchester, 6BR and .223. Before I bought the Dillon, I loaded everything on the Herters press. Now, I load the .45 ACP, .308 Winchester, and .223 on the Dillon and load the 6BR on the Herters. When loading .45 ACP, I use the Dillon in full progressive mode; when loading .308 Winchester and .223, I use the Dillon in semi-progressive mode. I resize and decap in one operation, I then wipe the lube off the cases, inspect and prime them with a Lee hand primer. Then I charge the cases using the Dillon powder measure and place the charged cases in a loading block. I check each charge by dumping the powder onto my scale and trickle it to the final value. I return the final charge to the case and replace it in the loading block. Finally, I go back to the Dillon and seat the bullets. If I were using rifle powder that metered well, I would load the rifle cartridges in full progressive mode. However, I am consuming the remaining stick powder from my single stage days so use the semi-progressive operation to get more consistent powder charges. Once my stick powder is gone, I will look for a better powder choice for the Dillon and load the rifle cartridges in full progressive mode.
I have not used a turret press so I cannot speak to ease and accuracy of operation of one. The Dillon works very well for me and Dillon supports it extremely well. I bought mine used. There were some issues which Dillon fixed by sending me the parts free of charge. Since then, I have had one failure from a stripped set of threads on the primer setup. Dillon, again, sent me the part free of charge. This failure occurred after loading over 20,000 .45 ACP cartridges. I use Dillon dies for .45 ACP and .308 Winchester and Lee dies for .45 ACP and .223 (I load two very different bullets in .45 ACP so I use two setups for it. The press came with the Dillon .45 ACP dies and I already had the Lee .45 ACP dies from the single stage days). Switching calibers on the Dillon is pretty easy. Other than the dies, switching between .45 ACP and .308 Winchester requires no change to the press. Switching to .223 requires changing the base plate. If I were priming the .223 on the Dillon, I would also need to change the priming setup. Since I am not, I leave the large primer setup in place. Changing the base plate and the primer setup is a relatively quick and easy activity.
I really like the use of the Dillon tool heads. Once I have the dies setup in a tool head for a particular cartridge, I can be loading consistent ammunition very quickly. One only needs to insert the dies into the press, adjust the powder charge as needed, load the primer tube and start turning out complete ammunition.
I have continued to load my 6BR on the Herters press. I take more care at each stage of the loading process with it. I think that the single stage environment encourages the extra care. My .223 and .308 Winchester loads are fired in AR platforms so the extra care is not a requirement. I am currently building a single shot .308 Winchester. I do not know which system I will use to generate ammunition for it.
Good luck with your decision.
Cort