Light your grill and set temperature to 275°F. On a Gravity Series grill, it should take less than 10 minutes to reach temperature.
While the grill comes to temperature, coat pork butt with coarse mustard. To layer on additional flavors, coat with a favorite pork seasoning.
Once the grill has reached temperature, smoke the pork butt for 6 to 8 hours at 275°F.
When the pork butt has reached an internal temperature of 195 – 200 °F, remove from the grill. Shred, serve and enjoy!