Fat Boy Prime Angus Prime Rib

1 prime rib (approximately 8 lbs)
Fat Boy Prime Angus Rub

Let roast stand for 2 hours to get to room temperature. Preheat oven to 475°. Cover liberally with Prime Angus rub. Place roast in pan bone side down. Cook for 20 minutes, then reduce to 325° for 2.5 hours or until done to desired temperature. Baste every 30 minutes. Remove when internal temperature is 15° from desired final temperature. Cover with foil and let rest for 20 minutes. Carve and serve. Medium rare is 135°, medium 145°, and well done 160°.