A friend has a cape gun/muzzleloader with the same exact sighting system. I too feel it is more of a range finder, I agree that the even spacing makes the idea of it being a sight not very realistic. That said, I have a Westley rifle with sights out to 1200yds. I bet the drop is figured correctly for the distances listed on the sight blades. Wether or not 400yd shots are good idea with open sights is another discussion.
Steve

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