In bowl of stand mixer, combine boiling water and oats, honey, melted butter. Cover and let sit for one hour.
In a medium sized bowl, whisk together the whole wheat flour, 2 3/4 cups of the all-purpose flour, salt, wheat gluten and dried milk powder. Set aside.
When oatmeal has cooled for one hour, add the flour mixture a cup at a time and knead by stand mixer for 7-8 minutes, Cover bowl with plastic wrap and let rise for about 1 1/2 hours, dough will be slightly sticky.
Spray two 9X5 bread pans with cooking spray. Grease hands, divide dough into 2 equal portions and shape each portion into a loaf. Place loaves into prepared pans, Cover with greased plastic wrap and let rise for about 1 hour, or until dough crests about an inch over the top of the pans.
Optional: spray loaves with water and sprinkle with oats just before putting into oven.)
Preheat oven to 350 degrees. Place loaves in oven and bake for 40-50 minutes, rotating pans 180 degrees halfway through baking time. The finished loaf will register 190°F on an instant-read thermometer inserted into the center.