These scoring overlays are designed to assist in obtaining the first decimal value of a score when using ISSF paper targets. Its accuracy is dependant on the target and the way it is handled.
Instructions for use:
1. Place scoring overlay over paper target with the ring centered over pellet hole.
2. Rotate scoring overlay so that the center line goes through the exact center of the target while maintaining positions of the ring / pellet hole.
3. Observe the numbered scoring lines. The one which lines up exactly with ( or closest to ) a scoring ring on the target indicates the first decimal value of the shot.
Example 1:

The air pistol shot hole is inside 10 ring, interger score = 10.
Scoring line No.5 on the gauge coincides with scoring ring on the paper target exactly, decimal score = 0.5.
Total final score = 10.5.
Example 2:

This air rifle shot hole is inside 8 ring, integer score = 8.
Scoring line No.4 coincides with scoring ring on the paper target exactly, decimal score = 0.4.
Total final score = 8.4.
Note: Scoring line No.5 is close, but not as exact as No.4.