What's your goal?
If Med/Rare 130°F Finished IT?
Then 30 per pound at 225°F, is about right. When the IT hits 120°F, pull it out, tent with foil and Counter Rest 30 minute before slicing.
If Pulled Beef or Well Done Sliced Beef is your goal, then figure 1.5 hours per Pound at 225°F until the IT hits around 200°F+/-5°...AND...Your Thermometer Probe slides in, everywhere, with no resistance.
Again, rest on the counter 30 and carve. Or, Counter Rest 15 minutes, double wrap with foil, towel wrap and cooler rest 1 up to 4 hours.
Slice or Pull the Well Done Beef and serve.
Personally, I would probably shoot for Med/Rare and slice as thin as you possibly could and serve Au Jus...JJ
Smokey Au Jus
1- Lg Onion,
4-5 Carrots,
3-4 Ribs Celery
3-4 Peeled Cloves of Garlic
Toss them in a pan under the Beef, and let the whole deal Smoke for one hour,
THEN add 4-6 Cups Beef Broth,
2 Tbs Tomato Paste,
1/2tsp Dry Thyme (4-5 sprigs Fresh)
1-2 ea Bayleaf
Finish the Smoking process to the IT you want.
While the Roast is resting, dump the pan juices veggies and all into a 2-3Qt Sauce pot and add 1Cup Red Wine, something you like to drink, and bring the Jus to a boil, lower the heat and simmer 20-30 minutes. Strain out the veggies and let the Jus rest a minute or so for the Fat to rise. Skim off the bulk of the fat then using strips of paper towel laid on top of the Jus, drag quickly across to take off the last little bit of fat.
The purpose of Smoking the Vegetable for 1 hour before adding the Broth and Herbs is...The Smoked vegetables Roast in the Dry heat concentrating their Flavors and Sweetness giving the finished Jus a Richer, Deeper, Full Flavor.
Serve the sliced Beef Au Jus or thicken the Jus to make Gravy.
NOTE: If you are using this recipe with Brisket or a long smoke, additional Water will have to be added periodically to maintain the proper volume. Do not add more Broth as repeated addition and reduction will make the Au Jus too salty..