If you haven't reloaded before - I suggest a MEC 600 jr - cheap and very easy to use / learn with. I still use one for my 12 and 20 ga reloads. Get a 7/8, 1, and a 1-1/8 oz bars with a nice assortment of powder bushings. Once I check my powder weight and adjust everything - I can rock out a reloaded shell every 20 seconds or so. A couple hours time will provide you with enough shells to keep you busy.
And Big Jim is on the mark about resizing. The MEC 600 does resize (somewhat), but if you make it a point to reload your own hulls after shooting (I shoot and reload gun clubs) there will likely not be an issue, esp in the OU.