Ok, the 180 comes from the instructions on the dry rub that comes with the FEC. I never use pre-fab rubs but figured I would give it a try (I did add some syrian pepper to it though.) Anyways, it says to bring to 180 but everything I have read says 190. I'm used to cooking ribs and pork butts/shoulders myself but have never gotten into briskets.
By the way, this is a 10.5lb brisket. I will try a packer from Sams when I go by there again. I'll go ahead and change the probe temp to 190.
Thanks for the advice.