Did my first turkey today. It was a 16 lbs. I want to thanks everyone for all the tips. I injected it with roasted garlic and pepper Corn marinade. And Jeff's basic rub. Being in NH the temps outside at 3:00 am was 29 degrees. I turned my master built up as high as it would go 275 the best I could get was 268. We reached the safe zone within the 4 hr window. After that I turned it down to 225. It was don in 6.5 hrs. Every one loved it