[jrb03]

I have done briskets at 300 in the backwoods smoker and could hardly tell a difference from one cooked at 225 except it finished much quicker. I have not cooked a brisket in the kettle before but do not see any reason it would turn out tough being cooked indirect. I cook ribs at 325 indirect in the kettle all the time, come out great and quick.

A 10 lb brisket at 225' takes 10-12 hours in my experience, no matter what cooker you are using. I dont foil though, so if you foil after a few hours that could get it done quicker, but i dont think in 6 hours.