Combine 2 cups flour and salt; set aside. Cream sugar and shortening; add eggs, one at a time, beating well after each addition; set aside. Combine buttermilk and soda, stirring well. Add to sugar mixture alternately with flour mixture, stirring just to combine. Combine berries and 1/2 cup flour. Gently fold into batter.
Spoon batter into greased muffin tins, filling 2/3 full.
Bake at 350°F for 20 to 25 minutes or until golden brown.