Mix your injection marinade ingredients together and fill syringe. Poke 1 hole and move the needle into different positions as you push out marinade into the turkey. Do this in different parts of the bird, making as little holes as possible while getting the marinade in as much of the bird as possible.
Take the soft or melted butter and rub all over the turkey, under the turkey skin and in the cavity. Mix the rub spices together and rub all over bird, in cavity and in under skin also.
The turkey needs to come to an internal temp of 165 degrees. Once internal temp of 165 is reached, remove from smoker, and let rest for 20 minutes. Carve and serve!