Hi,
I've built guns for target shooters, hunters, old guys with old eyes, young guys with young eyes, and folks wanting something as historically correct as possible. Beside placement of the rear sight on the barrel, there are a few "almost" universals. Target shooters who fire many rounds at a range usually want high sights because after a few shots the heat waves on a barrel obscure the front sight. I've tested this myself with rifles that had historically correct low barley corn sights. After 3-4 shots on a warm day, I can no longer reliably see the front sight. For a hunting situation involving one or 2 shots at most, the low sights were fine and just as accurate as any other. However, on a shooting range, they are not so good.
dave