JC. thanks for the answers
Let me try to clarify 4.
I had read that there was a 50 degree difference in from the center of the grill to the outside of the grill. If all readings are done from the outside (225*) that would mean the center would be then 275*. OK?
I had smoked a brisket @ close to 225* on the center of the grill and probably didn't cook it long enough but it was @ 195* when I pulled it. The point was to me a little rubbery.
My question is "Where are most reading temps from, center or outside?"
My test burn last night ran about 14 hours with a 90% charcoal burn on about 7 lbs of charcoal, a lot better.
Small Charbroiller, 40 year old barrel pit, UDS, 97 Weber Performer, Brinkman gas grill.