In a large mixing bowl combine pumpkin, apple butter, sugar, cinnamon, ginger, and nutmeg. Add eggs; beat with wire whisk until combined. Gradually stir in evaporated milk and milk; mix well.
Prepare and roll out pastry as directed. Line a 9-inch pastry plate with pastry. Pour pumpkin mixture into pastry shell. To prevent overbrowning, cover edge of pie with foil. Place in a preheated 375 degree oven for 25 minutes. Remove foil and bake about 25 minutes more or until a knife in center comes out clean. Cool on a rack for 1 hour. Chill 3-6 hours before serving. Store in the refrigerator. Serve with whipped cream if desired.