I dont shoot skeet or trap too much anymore these days although occasionally I will shoot a couple of rounds to keep me up on my game.
I used a Mec 600 Jr and managed just fine although a progressive press would have been better. I think it all comes down to how many rounds you shoot a week and how much you enjoy reloading. I personally dont mind sitting down at the bench and cranking out a couple of hundred rounds in a couple of hours, others find this to be more of a chore. I really liked the simplisity of the Mec 600 myself. I still use it a good bit but these days I am loading 00 buck and slugs more than small shot.
Its really a simple set up and loading shot shells is far less tidious from a attention to detail point of veiw than metallic shells can be. Thats not to imply that you cant screw up and get yourself hurt. I just bought the Mec 600 for 5.00 bucks, bought a replacement 2.00 dollar spring that was missing, got a couple of bushings and charge bars and was off to the races and running within the hour. There was only a need to make slight adjustments to the crimper, everything else was pretty simple and straight forward. I did find that the little metal shell holder that holds 25 rounds and allows you to put a empty cardboard box over it and then neatly dump the shells into the box to be a nice addition. A tube attached to the bottom of the press where the primer is punched out, that feeds the spent primers into a small bucket under my bench a nice little jury rigged feature as well to keep the reloading area tidy. The small powder containers that screw into the top of the press was fine for powder, but for shot I found the larger container to be more useful so I wasnt constantly re-filling it with shot. As far as powders, I am still old school and use Unique and BlueDot. I can generally load rounds to acceptable performance levels with just these two powders which I also use ion some pistol loads as well. I am sure that some of the newer powders are just as flexible. But unlike a lot of metallic cartridges no need to have a half a dozen powders to cover the bases.