These shrimp certainly have some fire, but if you really like them spicy, adjust the cayenne pepper according to your taste. This is from a cookbook called "The Backyard Barbecue Cookbook"
Ingredients
2lbs large raw shrimp
2tablespoons olive oil
DRY SPICE MIXTURE
2teaspoons black pepper
1⁄2teaspoon salt
1teaspoon onion powder
1teaspoon dried chili pepper flakes
1teaspoon ground sweet paprika
1⁄2teaspoon cayenne pepper
1teaspoon ground oregano
1teaspoon thyme
1teaspoon garlic powder
Direction
Shell the shrimp, leaving tail shells on.
Skewer six shrimp on each of eight metal skewers.
Brush with olive oil.
To make the dry spice mixture: Combine ingredients and sprinkle over the shrimp on both sides.
Cook on a hot barbecue grill for 4 minutes each side or until shrimp are pink and tender.