How long does it take a 12.96lbs turkey in the smoker grill?

Are you smoking or bbqing. Smoking is cooking at 225 and under for hours, bbq is 225-450 for a whole lot less hours. At that weight you run a very high risk of a very dryed out bird if you are truly smoking. Are you brining- that weight would take a minimum of 48 hours plus 12 hours dry time so you should be in brine now!!!

A 20-25 pound bird cannot be safely smoked, it will stay in the danger zone way too long and may get contaminated. That means you are just substituting a smoker for an oven, probably at the same temperature, and then adding a little smoke flavor to the outside. Assuming you are bbqing at over 350 and have not brined the bird, it will probably cook faster in a bbq than in the oven.

I have a 14 pound turkey, that has already been apple brined for 24 hours. It will go in the smoker Tuesday am with charcoal and apple wood. Temp will be in the 200 to 225 range for the entire time. I expect it to take 8-9 hours. It will then be served cold Thursday. I may do a second Turkey Thursday that will be served warm, but will do half smoke (under 225 degrees) and then finish it at about 300 degrees depending on its internal temp. It will also be about 14-16 pounds and will take at least 7 hours if I crank it up at the end to 300. I use a offset smoker that has no direct heat. Did two chickens Sunday of 4 pounds each that took 4 1/2 hours, but as I say they were smoked not bbq'd.