Combine sugar and water in a large saucepan; bring to a boil, stirring until sugar dissolves. Pour into a large bowl; cool completely.
Place strawberries in a blender, and process until smooth. Add strawberry purée and buttermilk to sugar syrup; stir to combine.
Pour the strawberry mixture into the freezer can of an ice-cream freezer, and freeze according to the manufacturer's instructions.
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