Meanwhile, whisk remaining tablespoon of the Dip Mix, lemon juice, salt, pepper and 1/2 cup sour cream in a small bowl.
Thread shrimp on Grill Comb or wooden skewers that have been soaked for at least one hour. Oil grill grates with non-flammable cooking spray. Grill shrimp until done - about 90 seconds per side. Remove shrimp from grill and keep warm.