Cut shortening into flour until mixture resembles coarse meal; add milk, stirring just until dry ingredients are moistened. Turn dough out onto a lightly floured surface, and knead lightly 4 or 5 times.

Roll dough to a 12 x 9-inch rectangle. Spread blueberries over dough; roll up, jellyroll fashion, beginning with long side. Set aside.

Melt butter in a 13 x 9 x 2-inch baking dish. Cut dough into 12 (1 inch) slices; place slices, cut side down, in butter. Pour sugar syrup around slices; bake at 350 degrees for 55 to 60 minutes or until golden. Serve warm.