The procedure I've used for many years is pretty straight forward and produces a perfect medium rare roast, center to outer edge, every time.....
- Bring roast to room temp. and apply seasonings/rubs of your choice.
- Cook/Smoke roast at 180F-200F until the IT is 118F-120F.
- Remove, tightly foil, and let roast rest for 30-45 minutes.
- Remove foil and put roast into an oven pre-heated to 550F for 7-9 minutes.
- Remove roast, slice, and serve.