Follow my recipe and toss the drumsticks in the olive oil with seasoning. Once you’ve grilled them on each side for about 5 minutes (as noted above) and they are brown and crispy on the outside, lower the grill to 300 degrees F. , lower the lid creating an oven environment and grill for about 25 minutes until the chicken is cooked through. Use a meat thermometer to check the temperature. They should be between 165 and 175 degrees F to be done. At the 25 minute mark, you are going to brush them with the citrus BBQ sauce. Rotate them several times and continue basting until you have a nice thick, slightly browned coating. About five minutes total.