I am upstate in the Greenville area, and set my damper to 1/4 open when I took it out of the box, and haven't tinkered with it since. I haven't worried about temps while cooking and so far all has worked out well. Chicken comes out perfectly and I have cooked a 5 1/2 hour brisket and still had good coals. You'll have no trouble with a shoulder.
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