Cajun Fried Shrimp

Name: Cajun Fried Shrimp
Ingredients: ¾ cup mayonnaise; 2 Tbsp cream-style horseradish sauce; 2 tsp ketchup; 1 tsp dill pickle juice; ½ tsp paprika; ¼ tsp salt; ¼ tsp pepper; ¼ tsp cayenne pepper; 1 cup buttermilk; 2 large eggs; 1 Tbsp hot sauce; 1 Tbsp yellow mustard; 1 Tbsp Cajun seasoning; ½ Tbsp black pepper; ½ Tbsp garlic powder; ½ Tbsp onion powder; 3 pounds large or jumbo raw shrimp (peeled and deveined but with tails on); 1½ cups cornmeal; 1½ cups all-purpose flour; 2 cups canola or vegetable oil (for frying)