I used a single for many, many years.....then it started hurting......we all get old eventually.
So when it started hurting (arthritis, and other things, I decided it was either find a hobby for old people or buy a progressive. I chose to reload easier......
Take that 300 rounds per month. I doubt you will be able to control yourself that well, (it gets funner the more you shoot) but say you do......on a single or a turret, that's stroking that press 1500 times to make 300 cartridges. On a progressiive, the same 300 rounds can be loaded in 300 strokes of the press, plus 4 or 5 more strokes (depending on whether you have a 5 or 6 station press) at the beginning, when you're fresh, to load the first one, while you fill up your stations with more cases.......but....from then on it's 1 stroke, one loaded cartridge......rifle or pistol. So for me it's a wear and tear difference. I couldn't see where a turret could help one bit with that.
But then there's the other problem......caliber change.....and the older you get the lazier you get. I went from one Rock Chucker to 3 singles and 3 progressives.....easier is addictive. Singles for case prep and load testing......and progressives for loading. I load pistol on one progressive, rifle on the other.....then I bought an inexpensive Lee 6000 to see what it could do, using my homemade case and bullet feeders. So I got the press and loaded 9mm on it, but I couldn't wait for the .223 shell plate to come in, so I tried to feed cases and bullets in .223 rifle anyway...using the ill-fitting 9mm plate. So how did that work out? Well cases wobbled, not being held by the proper shell plate....but it still worked fine. See for yourself:
What does a T7 turret cost compared to a SIX station Lee 6000? Well, at Midway the progressive is $6 more for a one caliber kit with a shell plate and powder measure included. The Redding is $400, for just the press, and $91 for each additional head. I know what I'd rather have......I love that little 6000 progressive. .308? just add a shellplate and dies and die bushings.....