I wouldn't think so, but many other guys do bigger smokes than I do. Maybe some will chime in.You are correct Bear!! The 4 pound test roast came out at a perfect rare-medium rare.. The two 7 pound roasts seem to cook much faster than I had anticipated.. I pulled them off the heat and wrapped them in foil until our guests arrived. They held around medium but the tenderness and amount of juice more than overcompensated for them being cooked a little long.. I have had this problem last time I did multiple butts as well.. Is it common for larger cooks to hold more heat and cook faster?