Place the roast in the crock pot. Add 2 bottles of honey BBQ sauce. Cook until beef is tender and easily shredded (6-8 hours, depending on the size of the roast). Take out the roast & shred. Put shredded beef back into the crock pot and add the third bottle of honey BBQ sauce. Mix together. Cook for another 30 minutes. Serve on the buns. Enjoy.