Mill your wheat berries on the finest setting of your grain mill.
In a large bowl, combine the flour and salt.
Either grate the butter with a box grater or cut into chunks and add to the flour mixture.
Using a fork or a pastry cutter, cut the butter into the flour until it looks like coarse crumbs.
Add 1 tbsp of water at a time until the dough sticks together in your hand without crumbling apart. After each tablespoon of water, test the dough to see if it sticks together without falling apart, but is still somewhat crumbly.
Place the dough on a work surface and shape into a ball and wrap in plastic wrap.
Place the dough ball in the fridge for at least 30-60 minutes.
When ready to make your pie, roll the dough out into a large circle that is bigger than the pie plate.
Lay into the pie pan and trim the excess crust.
Fill and bake according to your specific pie instructions.
You can also par bake or blind bake the crust with pie weights or dried beans on top for 8-10 minutes at 375 degrees F, or bake for 35-40 minutes to completely bake the pie crust for no bake pie recipes.
You can freeze the pie dough by wrapping in plastic wrap tightly or placing in a freezer bag. Thaw in the refrigerator overnight.