I am positive I know the answer, but I will ask anyhow. I smoked 4 prime beef ribs I bought at Costco that weighed a pound each. I smoked them for about 4 hours at 225 (I know they were probably done at this point), THEN decided to wrap them for about 45 mins to an hour at 290. After they rested for 30 mins I discovered the bones literally fell off. I charred them on the grill anyways. Needless to say, they were dry. I assume I overcooked them.