Procedure:
- Set up a tall target at 100 yards (PHYSICALLY MEASURE FROM TARGET TO SCOPE) with a vertical line (confirmed with plumb bob or level).
- Place an aim point near the bottom of the vertical line and shoot a group to confirm zero.
- Dial up at least 30 MOA (or 10 MILS) of elevation and shoot another group.
- Measure the distance between shot groups with a tape measure. ( See fractions to decimals table at bottom of page )
- Use the calculator below to calculate your scopes Correction Factor (CF).
- Apply the Correction Factor to any raw ballistic solution to account for scope tracking error.
- Enter Correction Factor into Sight Scale Vertical section of the Applied Ballistics Solver. ( SEE SCREENSHOT )
- See below videos for instructions on use of this calculator and how to do a tall target test
click image to enlarge
Correction Factor Calculator
| FRACTION TO DECIMAL TABLE | ||
|---|---|---|
| 1/32″ | = | 0.03125 |
| 2/32″ or 1/16″ | = | 0.0625 |
| 3/32″ | = | 0.09375 |
| 4/32″ or 1/8″ | = | 0.125 |
| 5/32″ | = | 0.15625 |
| 6/32″ or 3/16″ | = | 0.1875 |
| 7/32″ | = | 0.21875 |
| 8/32″ or 1/4″ | = | 0.25 |
| 9/32″ | = | 0.28125 |
| 10/32″ or 5/16″ | = | 0.3125 |
| 11/32″ | = | 0.34375 |
| 12/32″ or 3/8″ | = | 0.375 |
| 13/32″ | = | 0.40625 |
| 14/32″ or 7/16″ | = | 0.4375 |
| 15/32″ | = | 0.46875 |
| 16/32″ or 1/2″ | = | 0.5 |
| 1/32″ | = | 0.53125 |
| 18/32″ or 9/16″ | = | 0.5625 |
| 19/32″ | = | 0.59375 |
| 20/32″ or 5/8″ | = | 0.625 |
| 21/32″ | = | 0.65625 |
| 22/32″ or 11/16″ | = | 0.6875 |
| 23/32″ | = | 0.71875 |
| 24/32″ or 3/4″ | = | 0.75 |
| 25/32″ | = | 0.78125 |
| 26/32″ or 13/16″ | = | 0.8125 |
| 27/32″ | = | 0.84375 |
| 28/32″ or 7/8″ | = | 0.875 |
| 29/32″ | = | 0.90625 |
| 30/32″ or 15/16″ | = | 0.9375 |
| 31/32″ | = | 0.96875 |