Dustin Dorsey
TVWBB Hall of Fame
I went back and read last night. At no point that I was able to see when discussing upright smokers does he mention anything about a preferred temperature, but when discussing cooking on a pit that isn't his, he says that 275 is his preferred starting point, choosing to alter from that based on how the cook is proceeding.
He does mention the pits at the restaurant being even hotter. In my experience 275 is a lot easier to maintain on an offset with a clean fire than 225. I have a smaller cheap offset though. He seems to place a lot of importance on convection and good air flow. I've been running my wsm some at 275 and I feel that it breaths a little better, but I can't say my results are all that different from 225. Other factors seem to be more important than temp. The single biggest is taking the thing off at the right time and letting the meat rest.