Mec JR reloading quiestion

[Gil Martin]

I work in Topton at the Lutheran Home and have been using MEC reloaders since 1960. I have a MEC 600 Jr. and several MEC SizeMaster presses in several gauges. The advantage of of the Sizemaster is the built in SuperSizer in the press. I bought a SuperSizer for the 600 Jr and now life is good. The older MEC presses size the shotshell brass, but do not always properly resize the shotshell rim. I have a few shotguns that will not function any reloads with oversize rims. Hope this helps. All the best...
Gil