Well i use a 366 and love it. Since you are already familar with the MEC products they may be easier to learn. However I myself started on a 600jr and had no problem learning the Pacific/Hornady 366. They are built like a tank and the only part i had to replace was the wad guide fingers(less than $5). My vote is always the 366 because its what i have. All the machines you listed will work just fine and do the same thing.
When I bought a progressive loader I looked at the Mec and 366 side by side. The heft and bulk of the 366 swayed me to the 366, the thing is rugged. Mec's sheet metal turned me off. Most people I shoot with have Mec's and have no problem, load lots of shells. Mec probably makes more shells than any other loader. I still think the 366 is the best built of the 2.
well I'm hoping the 366 I just acquired does a good job, has an extra station or 2 compared to the Mec's, but will still make a shell with every pull of the handle. The Mec may cycle slightly faster, but then it also had a tendency to drop ligher charges, or hang up completely on the powder delivery/ on occasion, I like the charging bar set up on the 366 best. Good luck with whatever you chose just go slow at first and watch everything till you get your machine and motion perfected.
As most above said the 366 will last longer than most of us, keep it oiled, start slowly-- carefully & watchfully as you would with any progressive machine because there is a lot happening with just one pull of the handle. If you have the operators manual read it thoroughly first. Don't be disillusioned at the early mistakes, once you get the "hang" of it you'll love it. Ross Puls
I have never used the 366 before, but it appears the resizing and de-primer is kind of cumbersome because you have to place the shell in the turret afterwards. The MEC 9000 you put the shell in the turret and it does everything from there.
Might want to look at a MEC 9000G or H model if you are interested in a progressive reloader.
Lou, I've only been reloading about 4 years now, and started out with a 366. Great machine, can do about 400 an hour pretty easy. Get the larger shot and powder tubes, and the hydralic piston option. Also drill a hole in the primer tube toward the bottom so you can tell whe you are about to run out of primers. It is my first reloader, so I could only be disatisfied if I had something better to compare it to. The above threads are all good... I've put over 30K rounds through it, and all is good. Mike