In a medium bowl, stir together the warm water and corn syrup. Sprinkle the yeast over the top, and let stand until foamy, about 5 minutes.
Step 2
Add 2 1/2 cups of the rye flour to the yeast mixture, and beat until smooth. Stir in the salt. Set bowl in a warm place, and cover with a cloth or towel. Let rise for 30 minutes.
Step 3
Stir in more flour 1/2 cup at a time, until the dough is stiff. Turn the dough out onto a floured surface and knead in more flour by hand as needed to form a stiff but slightly sticky dough. You may use less or more flour. Form dough into a ball. Clean the mixing bowl, and lightly grease it. Place the dough in the bowl, and cover with a towel. Place in a warm place to rise until doubled. This may take as long as 2 hours.
Step 4
Turn the risen dough out onto a floured surface, and press out the air bubbles. Roll dough into a loaf, and place into a greased 9x5 inch loaf pan. Turn the loaf so that the seam is on the bottom. Cover the pan with plastic wrap, and let rise in a warm place until doubled, about 1 hour.
Step 5
Preheat oven to 350 degrees F (175 degrees C). Remove plastic wrap from loaf pan.
Step 6
Bake for 30 to 35 minutes in the preheated oven, or until the loaf sounds hollow when tapped on the bottom. Bread will not brown very much.