In food processor process butter, (cut in pieces)salt, sugar, baking powder and flour. Pulse until mixture is coarsley combined.
In mixing bowl place bacon, cheddar cheese, chives, and flour mixture. Combine well and add milk a little at a time until mixture is stiff. Knead a few times and form into ball. Wrap mixture in plastic wrap and place in refrigerator overnight.
When ready to bake preheat oven to 400 degrees. Roll out scone mixture into a round cylinder shape about 1/2" thick. Place on greased baking sheet. Cut round into wedges. Pull each wedge back so that there is 1/2' between wedges. Brush scones with melted butter and bake for 20 min. Remove from oven and baste with additional melted butter.