Preheat oven to 350ºF.
In an ovenproof kettle cook the beef, bacon, and onion over moderate heat, stirring occasionally to break up any lumps, for 15 to 20 minutes, or until the beef is no longer pink and the bacon is slightly crisp. Transfer the mixture to a sieve and let it drain.
Return the mixture to the kettle, add the ketchup, barbecue sauce, salt, mustard, molasses, chili powder, pepper, and all of the beans. Stir the mixture until it is combined well. Bake the mixture, covered, in the middle of the oven for 1 hour. Serves [8 as a main dish] or 20 as a side dish.