Barbecue Beef

 Barbecue Beef 

3 lb chuck roast 
1-1/2 cup ketchup 
1/4 cup red wine vinegar 
1/4 cup packed brown sugar 
2 tbsp dijon mustard 
2 tbsp worchesire sauce 
1 tsp salt 
1/4 tsp pepper 
1/4 tsp garlic powder 

Place roast in crockpot. Mix remaining ingredients in a large bowl and pour over roast. Cook on low 8-10 hours. Remove beef, shred and return to pot. Stir to coat. Serve on rolls.