MEC 600Jr Mk5 10 GA, 12 GA 3 1/2"

I have a MEC 650 Jr I use for reloading all my waterfowl loads. I can load 12 Ga 2-3/4 & 12 GA 3" with the same dies. To go from 2-3/4 to 3" I raise the post 1/4", then adjust the deprime punch and resize ring. Next I add a supplied 1/4" spacer ring under the primer reciever in station #2. My press was manufactured before the invention of 12 ga 3-1/2" so I do not have the spacers that would be necessary to do 12 ga 3-1/2" but I would guess that they are now available from MEC. I have a complete set of dies for the same machine for 10 ga 3-1/2" and that change over is more complex but the changeover directions are accurate and the machine does fine. Before non toxic shot was mandatory for waterfowl I loaded lead in all these shells as well. I have the steel charge bars but do not use them. I hand weigh all shot and powder charges for steel shot. A word of caution: large lead shot will sometimes be difficult to meter with MEC charge bars so be careful.