I have had a butt half spiral ham, a little over 11 pounds on the MAK 1 star for just over 5 hours and it is at 127 degrees. I started at 245 for the first 2 hours for the smoke and then I set it to 275, after an hour bumped it up to 285 for an hour but figured the outside would be too done before the inside was heated so I put it back to 275. I have it on the upper shelf, there must be something wrong. Thermo and cooker were cleaned before starting and I made sure everything went back together correctly. This cook and my last cook, the cooker has held on the exact temp it was set at without any fluctuation which is not normal. Next time I will check the cooker temp with another source to see if the controller could be off. Beyond that, I have no idea.