I smoked a prime rib this weekend. The night before I used the NDSU carnivore rub (1/4 cup kosher salt, 1 tblsp black pepper, 1tsp garlic powder). I smoked on pecan wood at 225 for about 3 hours. I assume 30 minutes/pound and the prime rib was 4.5lbs. Pulled at 120F, rested by tenting in tinfoil for 30 minutes. A little bit of horseradish and it was awesome.