Installed a set on my 45-70 today and tried it out on the range. Really an outstanding combo. Looking at it, you wouldn't think that the ghost ring idea could work. But after a bit of practice, I stopped thinking about trying to center the front sight in the rear. It just sort of centers itself without me having to concentrate. Very intuitive and accurate to boot. Does well out to 50 yards, ran out of ammo before I got to 100. Go, Rockchucker, Go!!!