In a bowl, combine the shrimp with chipotle chili powder, lime juice, olive oil, garlic powder, cumin, salt, and pepper. Toss until the shrimp are evenly coated.
Allow the shrimp to marinate for about 15-20 minutes to infuse with flavor.
Preheat a grill or grill pan over medium-high heat.
Once hot, add the marinated shrimp and grill them for about 2-3 minutes on each side, or until they are pink and opaque. Be careful not to overcook.
While the shrimp are cooking, warm the corn tortillas on a dry skillet for about 30 seconds on each side until pliable.
Assemble the tacos: Place a few pieces of grilled shrimp on each tortilla, top with shredded red cabbage, avocado slices, and a sprinkle of fresh cilantro.
Serve the tacos with lime wedges on the side for squeezing over the top just before eating.