Bone out rib roast, cook time? Pics added!

[HUNTINCOUPLE]

Nice!

[TheHunt]

This is how I cook prime rib.

I pull the roast out of the refrigerator about 6 - 8 hours before it gets cooked to get the meat to room temp.  While the meat is coming to room temperature put a towel over it.  You do not want it to dry out.

Put a rub the last hour or so based on when it gets to room temperature.

Cook at 275 and cover the roast with foil while cooking.  NEVER open the oven door.  Use a digital thermometer with a cord which can read the internal temperature without opening the door.  When the temperature reaches 120 - 125 shut the oven off.  Leave the roast in the oven for 30 minutes to rest.  Pull out the roast and start slicing.   

I did a 20 lb Prime Rib Roast for Christmas and it was fantastic. 

[Bigshooter]

My favorite way to do it is as follows:
Lightly cover the roast in sea salt
Wrap in cheese cloth, let set in the fridge at least 3 days, 5 - 7 is better
Remove from fridge wash off salt and let sit on the counter for 6 - 8 hours
Season with Johnnys,  make small cut and stuff whole crushed garlic cloves in the meat
Place in oven at 450 for 20 mins, turned down to 325 and cook to an internal temp of 125
Remove from oven wrap in foil let sit until internal temp reaches 135.

I like it this way because not everyone like medium rare.  The ends will be more medium and the center will be closer to medium rare cooked this way.  If you want it medium rare throughout drop the temp to 200 after the first 20 mins.  Everything else stays the same.

[CAMPMEAT]

Here's the absolute best way to do a rib roast. Eat it at somebody else's house.