When I mainly used my Chargriller w/SFB, the best I could get was about 225. On a good day, had a little more range up to 275. With the UDS, I have been cooking brisket in the 275 -290 range and love it. The brisket is good and I don't have to spend all day baby sitting the cooker.
Operation BBQ Relief Founding Member - I am Obsessive Compulsive about BBQ. Google it.