Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   3      cups          celery -- chopped
   1      cup           onion -- chopped
   1      cup           ketchup
   1      cup           barbecue sauce
   1      cup           water
   2      tablespoons   vinegar
   2      tablespoons   Worcestershire sauce
   2      tablespoons   brown sugar
   1      teaspoon      chili powder
   1      teaspoon      salt
     1/2  teaspoon      pepper
     1/2  teaspoon      garlic powder
   1                    boneless chuck roast -- (3 to 4 pounds)
                        -- trimmed
  14                    hamburger buns -- ¥split (14 to 18)

Preparation:

In a slow cooker, combine the first 12 ingredients; mix well. Add roast. Cover and cook on high for 6-7 hours or until tender. Remove roast; cool. Shred meat and return to sauce; heat through. Use a slotted spoon to serve on buns.