A good base rule to go by is to plan 1 pound of cooked pulled pork for every 3 people. This means that about 1/3 of a pound (or 5 ounces) is good for one serving. That applies to COOKED pulled pork weight - but pork will lose some weight in the cooking process from the original uncooked pork shoulder or butt weight. I like to plan for about 1 pound of UNCOOKED pork per person for pork shoulder that has any bones in, or a lot of fat that will be trimmed off, since they take up a lot of the uncooked weight and won't be eaten.