So I smoked another brisket yesterday/last night/this morning. It was a 13 hour smoke... did about 7 hours at 225 in my offset smoker, and then wrapped it up and did about another 6 hours in my kamodo at 225-250 until internal temp in the point was 200. I used the "toothpick test" to determine the doneness of the meat, and when it hit 200 there was no resistance at all.
The point was amazing, but the flat was a bit dry. The point is melt in your mouth, just by itself, but I think the flat would do better as meat for a sandwich. I used my normal brisket rub, and I injected with beef stock. I also spritzed about every hour after the first hour.
I'm still confused as to how the flat is dried out. When I cook hot and fast (350 degrees for about 4 hours) both parts of the brisket are super succulent. But when I go low and slow I always end up with a very different product where the flat is a little dry. Any constructive pointers?