Took you a while to come up with that (ain't the internet great). But I think it's closer to 17 inches. Of course, that's for a .58 RB pushed by 120 grains FF black powder, going 1630 fps (from Lyman) at 5,000 feet in elevation, but it's only a guess.
Holding off a foot and a half with iron sights on a big game animal is something I'm not interested in. Actually, taking a 200 yard shot on a big game animal with a muzzleloader is not something I'm interested in.
But if I was, it sure as he** wouldn't be with a patched round ball and that kind of wind drift and iron sights. There are a lot better bullets available for that.
