As far as I know, it's any shot. Not sure about the gun, I only tried it with shotgun. I'm guessing it's the same way with every gun as well.
The area in which the shot ended, where the projectile stopped from its range limit, would have a very small spot where you could permanently see the area. It's only noticeable if you do it away from the center where all the NPCs are since you'll always have vision there.
As for the version, I only know that it's funky in 6.1.