For PR60 - we recommend approximately 80 lbs. of charcoal to cook a 200 lb. pig (live weight), 160 lbs. (dressed), or approximately 100 lbs. of charcoal for a 250 lb. pig (live weight), 200 lbs. (dressed) at a temperature of about 300 degrees.
For BBQ42 - we recommend approximately 25-30 lbs. of charcoal to cook 40 lbs. of chicken for first rack. If you wish to continue to a second rack, add approximately 10-15 lbs. of charcoal. For other cuts of meat, grilling, smoking, etc., put in your desired amount of charcoal.