Improved Windage Formula 

Below is an improved windage formula I developed for a computer program I was designing. 

Multipliers good out to approximately 1000 yards

Multiply the Multiplier X Wind Speed X the Range in Yards

.308 168 gr. @ 2700fps 

The Multiplier is .0008?

“?” = (Range x .01) Example: 500 yards X .01 = 5.00 “Hint: just move Decimal two places left”

 Examples

Yards     Multiplier

100 -      .00081

200-       .00082

300-       .00083

400-       .00084

500-       .00085

600-       .00086

700-       .00087

800-       .00088

900-       .00089

1000      .00090

The Formula is

.0008? X Wind Speed X Yards = MOA

 For example a .308 @ 2700 fps with a 10 mph wind at a range of 500 yards the formula would be:

.00085 X 10 mph =.0085

.0085 X 500 yards = 4.25 moa

 JBM Ballistics shows 4.4 so that’s pretty close.

 .223 55gr @ 3240fps  10 mph wind

For the .223 the Multiplier is .001?  With “?” = (Range x .01)

The formula for the .223 is the same as the example for the 308 above, just the Multiplier is different

Yards    Multiplier

100 -      .0011

200-       .0012

300-       .0013

400-       .0014

500-       .0015

600-       .0016

700-       .0017

800-       .0018

900-       .0019

1000      .0020

Comments