I have been doing 2 to 3 briskets a year, but lately I have been having an issue I can't seem to nail down what my problem is. For some reason my briskets are getting burned on the bottom to the point that it is rock hard. I use briskets from C&C, trim the "corn" section of the fat off the bottom and bring down the fat cap down to 1/4" in the thicker areas. This is covered in a basic S&P rub. I am running a GMG pellet smoker with temp set to 250. I am monitoring the pit in different areas and though the far end of the pit is a bit warmer, I put the thicker on on that side and fat cap up. I pull it off at about 200-205. Any thoughts on why I am burning the bottom? Thanks All.