Preheat your oven to 400 degrees F and line a large baking sheet with foil. Spray it with a nonstick spray and set aside.
In a medium bowl, combine the sour cream, cream cheese, mayo, hot sauce, chipotle chili powder, black pepper, cheddar cheese, and pimentos. Fold the ingredients together until everything is evenly distributed. Adjust the seasoning to taste.
Take each half of your french bread loaf. I ripped out a little bit of the center of the bread to make a small well. This is completely optional. Evenly spread the pimento cheese on each half. I used all of the pimento cheese, but feel free to refrigerate any extra you may have.
Spray the bread with a nonstick olive oil spray, and place it in the oven. Bake the bread for about 12-15 minutes or until melty and slightly brown along the edges.
Remove from heat and cut into pieces. Enjoy immediately!