Preheat oven to 350. Mix flour, salt, baking soda, & baking powder together in a medium bowl.
Pour buttermilk in and gently stir. Add the raisins and stir just once more.
Pour the mixture onto a lightly floured surface and knead the dough very lightly for about 2 minutes. You don't want to over-knead it or you will lose some of the flakiness.
Form it into an 8 inch round and place in a lightly greased pan.
Bake for 40 minutes, and allow to cool before slicing.