Uncategorized What To Do With Leftover Prime Rib Bones A typical prime rib weighs about two pounds per bone with the bone on depending on the size and age of the steer and in recent years that weight is that will be more than enough and you might have leftovers for killer roast beef sandwiches Prime rib roasts must be labeled usda prime beef a rib roast doesn t have the enough marble needed to be a prime cut