Bore sighting scope with no gizmos: camera?

[Darto]

I think the camera image on the right must be dubbed in just to illustrate but not the actual image?

[mtenenhaus]

i bet you're correct with respect to the illustration. That said that is the technique i was taught to dial in a rifle. I found it much easier to start at 25- 50 yards otherwise i find it's really tough to making out any specific area on the target.

From there it's easy to adjust to 100 yards.