I've only done a couple of briskets, nice big thick slabs, not the rolled ones. And mine have been done to temperature within 5 - 7 hours and I'm sure it should go for longer
I need more practice though, so watching this thread with interest.
Also, I've been watching Franklin on YouTube, I heard about him ages ago somewhere but completely forgot about his videos when I did my briskets. Have a butchers (forgive the pun):
Prep
http://www.youtube.com/watch?v=VmTzdMHu5KUCooking
http://www.youtube.com/watch?v=pGZ39yYxeBkThe good bit
http://www.youtube.com/watch?v=sMIlyzRFUjUIf it's anything like pulled pork and ribs I'm sure I will get it with practice, I used to cook the ribs to temperature and found they were always cooked in about 2 hours, which confused me as I was reading about people using the 3-2-1 technique. SO I gave it and gave it a go, I do 2-2-1 and I love them like that, but sometimes I do them a little longer too. So hopefully after doing as many briskets as I have pork shoulders or ribs it'll be second nature.