It's good to get back in the game; you'll be up and running in no time.
Do you have to use buckshot legally? If not, consider stout BB loads. I've been using Hornady Coyote loads with BB shot and the improved cylinder choke in my Franchi Affinity. Works very well at shotgun distances. There may be other factory BB loads. Get a couple of those, some #4 from Cabelas's or Graf's or Midway, your factory chokes, and head out to do some patterning.
Good luck!
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"A person is smart; people are dumb panicky dangerous animals and you know it." K as played by Tommy Lee Jones, Men In Black