Zeroing a weapon means setting the sights so the MPI (mean point of impact) of a group matches the point of aim. Do not confuse it with sighting shots in the app (Sighting): those come before the scored shots and do not count toward the result, as the training diary article explains.
What you need
- A weapon in working order, checked for safety
- The same ammunition you will use in competition
- A target for your distance and a solid rest or shooting table
- Paper or the app to record adjustments
Steps
- Make sure the weapon is unloaded and the muzzle points in a safe direction.
- Check that the diopter, front sight, and stock are secure. Play in any of them makes the result random.
- Fire a 5-shot group from one position at one point of aim.
- Find the MPI of the group and measure how far it sits from the point of aim, up or down and left or right.
- Move the sight line toward the MPI, which means the way the group went. The turning direction is marked on the diopter housing.
- Fire a new group and compare again. Stop when the MPI sits on the point of aim.
- Record the final adjustments in the app: Profile → Weapons → Sight adjustments.
Safety
Unload the weapon before every adjustment and keep the muzzle pointed in a safe direction. Keep your hands and tools away from the front of the muzzle.
Reading the group
One group of 5 shots is a small sample. If the series is scattered, deal with your position and trigger first, not the sights. Do not change adjustments because of one stray shot.
One variable at a time
Change only elevation or only windage between groups. That way you can see which change moved the MPI.
When to zero again
Zero again after you change ammunition lots, replace a diopter or front sight, knock the weapon hard, transport it, or change distance. Check your adjustments in different light too, but a small shift in a group is not a reason to change everything.