Mill wheat berries in grain mill on medium-fine setting. Measure 3 cups (480g) wheat berries to get approximately 4.5 to 5 cups fresh flour. Let flour cool 5-10 minutes if warm from milling.
Pour warm water (105-115°F/40-46°C) into small bowl. Sprinkle yeast over water, add 1 teaspoon honey, and stir gently. Let stand 5-10 minutes until foamy and bubbly.
In large mixing bowl, combine 4 cups fresh milled flour with salt and vital wheat gluten (if using). Whisk to distribute evenly.
Make a well in center of flour mixture. Pour in activated yeast mixture, remaining honey, and olive oil. Stir from center outward until combined into a shaggy dough.
Turn dough onto lightly floured surface. Knead 10-12 minutes, adding small amounts of flour as needed to prevent sticking. Dough is ready when smooth, elastic, and springs back when poked.
Shape dough into a smooth ball and place in lightly oiled bowl, turning to coat. Cover with damp towel or plastic wrap. Let rise in warm (75-80°F/24-27°C) spot for 1.5-2 hours until doubled in size.
Punch down dough and turn onto lightly floured surface. Pat into 9x12 inch rectangle. Roll tightly from short end into a log, pinching seam and ends closed. Place seam-side down in greased 9x5-inch loaf pan.
Cover loaf pan loosely with damp towel. Let rise in warm spot 45-60 minutes until dough rises about 1 inch above pan rim. Preheat oven to 350°F (175°C) when 15 minutes remain.
Place loaf pan in center of preheated oven. Bake 40-45 minutes, rotating pan halfway through. Bread is done when top is golden brown, sounds hollow when tapped, and internal temperature reaches 190-200°F (88-93°C).
Let bread cool in pan 5 minutes. Turn out onto cooling rack and cool at least 30 minutes before slicing with a sharp serrated knife.