Blueberry Oat Scones

• 3 cups all purpose flour
• 1/3 cup (packed) golden brown sugar
• 1 tablespoon plus 1 teaspoon baking powder
• 1 1/2 teaspoons baking soda
• 3/4 teaspoon coarse kosher salt
• 11 tablespoons (1 stick plus 3 tablespoons) chilled unsalted butter, cut into 1/2-inch cubes
• 1 cup plus 3 tablespoons old-fashioned oats
• 1 cup fresh or frozen blueberries (about 5 1/2 ounces)
• 1 3/4 cups chilled half and half
• 1 teaspoon vanilla extract
• 5 teaspoons raw sugar*