Explain what is meant by an 'offset' or 'zero shift' and how to correct it.

• A. Weather phenomenon.
• B. Drift of the zero due to recoil or mounting changes; re-evaluate and adjust zero using proper techniques or re-zero at the distance.
• C. The rifle is broken.
• D. Zero shift means the bullet always hits the same place.

Answer: (B)

The idea being tested is how a sighting system can move off its set point. An offset or zero shift is when the zero you established no longer matches the point of impact, usually because the rifle or optic shifted during recoil or after mounting changes. To fix it, you re-zero using proper technique at the distance you plan to shoot, making sure the optic is securely mounted and torqued to spec, and that your shooting setup (cheek weld, stock pressure, and body alignment) is consistent. In practice, you would verify with a bore sight or live-fire at the chosen distance, then adjust windage and elevation until the point of aim aligns with the desired impact. It isn’t a weather phenomenon, a guaranteed broken rifle, or a statement that bullets always hit the same place.