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
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 |