flatsguide - the wide V Express sight that I use, is a modern version giving better vision of the animal and surrounding area, especially in running shooting.
The cap-lock era V's, such as on the Joseph Lang 1853 16 bore I pictured were not as wide, however, sighting is done the same. The bead is placed in the
bottom of the V.
If there is no time to raise a blade for further distances, the bead is simply raised inside the "V". To see what that would look like, after sighting in and perhaps
marking the side for range, raising the blade against the standing sight and looking at the relationship of the bead in the longer range sight against where it would
be in the stand-ing sight will give the sight picture needed for the longer range when using only the first sight for aiming as a fleeing animal, or such.
I hope I explained that well enough.