Last night I did some smoking, we had a fattie, 10lbs of wings, 2 whole chickens and 2 8lb. butts. everything came out great but the butts took a very very long time. We put them in the smoker at about 8:00am and we took them off at about 8:30pm at 151* wrapped them in tin foil and put them in the 250* oven for another 1 1/2 hours till they reach 190*. Is this a normal time for that size butt?