01 - In a small bowl, combine smoked paprika, garlic powder, onion powder, kosher salt, black pepper, and chili powder. Mix thoroughly until evenly blended.
02 - Pat the chuck roast dry and rub the spice mixture evenly over all surfaces of the meat, pressing gently to adhere the seasonings.
03 - Set the seasoned chuck roast in the bottom of the slow cooker, arranging it fat-side up to allow the rendered fat to baste the meat during cooking.
04 - In a mixing bowl, whisk together the barbecue sauce, beef broth, apple cider vinegar, brown sugar, and Worcestershire sauce until the sugar dissolves and the mixture is smooth.
05 - Pour the sauce mixture evenly over the seasoned chuck roast in the slow cooker, ensuring the meat is well coated on all sides.
06 - Cover the slow cooker and cook on the low setting for 8 hours, or until the beef is fork-tender and pulls apart with minimal effort.
07 - Carefully remove the roast from the slow cooker and transfer to a large cutting board. Using two forks, shred the beef along the grain into bite-sized pieces, discarding any large pieces of fat or gristle.
08 - Return the shredded beef to the slow cooker and stir gently to coat all the meat thoroughly with the sauce. Serve hot on burger buns topped with coleslaw, or over rice as desired.