Jeff Cooper and Elmer Keith had their front sights modified with a gold line across the face sight. Line up this gold bar with the back sight, the target on top of the front sight and they could hit almost anything at 100 yards(300ft).
I do the same with an auto pistol I have. I line up the base of the front sight with the top of rear sight, place the target on top of the front sight and can hit it at 25 yards. Using the sights normally makes the hit very low.