Preheat oven to 550F degrees.
Roast at 550 at 5 minutes per pound for RARE, or 6 minutes per pound for MEDIUM and 7 minutes per pound for WELL DONE.
Turn off oven at the end of cooking time and DO NOT OPEN OVEN DOOR FOR TWO HOURS.
At the end of the 2 hours, remove meat from oven to slice; it comes out perfect everytime.
Works the same with Roast beef. Try it you won’t be disappointed.