A zero target is useful only when the shooter and coach can tell which impacts belong to each group. Marking every group before firing the next one prevents old holes from being mistaken for new data and makes sight corrections easier to explain.
Reference note: The original article used the Army zero target and 2017-era TC 3-22.9 guidance. Use the latest approved manual, target, technical publications, and unit procedures for current standards and adjustment values.
Mark Each Group Before Continuing
After the line is safe and the target may be handled, circle or color-code the impacts from the completed group. Record the group number, aiming device, ammunition, firing position, and correction made. A different color for each group creates a visible history of the zero process.
Evaluate Precision Before Moving the Sights
First determine whether the group is consistent enough to support a useful correction. Measure the widest spread or use the method required by the current standard. A large group may reflect inconsistent position, aiming, trigger control, equipment, or environmental conditions. Moving the sights based on unreliable data can simply move uncertainty around the target.
Find the Group Center
Estimate or calculate the mean point of impact for the group rather than correcting from the closest or worst individual shot. Compare that center with the target’s prescribed point of impact. Then convert the required movement into the correct adjustment for the specific sight or optic.
- Confirm the direction of impact movement before adjusting.
- Use the sight’s documented adjustment value.
- Record the correction.
- Fire another complete group before judging the result.
Distinguish Shooter Error From Equipment Problems
A coach should watch the firing process while also reading the target. Inconsistent position, changing point of aim, poor support, or disturbance during the trigger press can enlarge or shift a group. Loose mounts, damaged sights, ammunition changes, or an unstable rest can create similar symptoms. Diagnose rather than assuming.
Confirm at the Required Distance
A short-distance zero is normally a means of establishing an initial relationship, not a substitute for confirmation at the doctrinal or operational distance. Trajectory, sight height, ammunition, weather, and the selected zero all affect where rounds strike beyond the initial target.
Use the Target as a Training Record
A marked target shows the sequence of groups, corrections, and final result. Keeping that record helps leaders identify recurring errors, evaluate coaching, and confirm which weapon, sight, and ammunition combination produced the zero.