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High Power Wind Lab

wind analysis and shot plotting for high power shooters
Download on the App Store
Get it on Google Play


Enter observed wind conditions and wind correction


Plot shots and wind to see how conditions develop over the course of string


Calculate total score, wind score and elevation score, time between shots, and review plots

High Power Wind Lab is a visualization tool for determining sight corrections based on observed wind conditions.

Use High Power Wind Lab on and off the range to interactively explore scenarios and better understand how wind affects the trajectory of a bullet. By changing the wind velocity and wind angle, the High Power Wind Lab shows the calculated correction as well as possible outcomes if the wind angle and velocity are misread. This interactive tool is invaluable for exploring the interplay of wind direction and velocity and the tradeoffs you need to make when deciding when to shoot and what correction to put on your gun.

High Power Wind Lab is also an advanced plotting tool for recording both shot placement and wind conditions. Use High Power Wind Lab during your shooting session to reveal predominant conditions and to limit your corrections to known good values. After shooting, review your plots to learn from your experiences.


Do you have a suggestion that will improve the app? Please send us your ideas using the support form at the bottom of the page.

Getting Started

The intro screen is where you will begin new shooting sessions. From here, you can select a Load, Target, Distance and name a shooting session. You can also load previous shooting session. It is important to select the target and the distance it will be used at, otherwise the app will not produce accurate calculations.

To select a load, distance or target, click on the corresponding entry on the screen. On the Load screen, you’ll be given the opportunity to create your own load or generate a demo load to get started.

After making these entries, click the Start button at the top of the screen.

The target screen will now be displayed with the following elements:

  • Wind direction dial
  • Wind flags
  • Correction scale (along the bottom)
  • Target

Wind Direction

Use the wind direction dial to pick the direction (angle) the wind is flowing. Touch and drag the dial to set the direction. At the 12 o’clock position, the wind is flowing directly towards the targets. At the 3 o’clock position, the wind is flowing from left to right across the range.

The wedge shaped selector is a total 30 degrees, +/- 15 degrees of the arrow. This angle represents an error in reading the wind direction.

As you record shots, pegs will appear around the perimeter of the circle. The length of the peg represents the wind velocity while position represents the direction.

Dist: distance to target.
Angle: wind angle in degrees.
V: wind velocity in miles per hour.
EV: effective wind velocity in miles per hour.
Man: manual correction added to correction scale in MOA
MOA: calculated correction in MOA

Wind Flags

The wind flags are used to pick the speed (velocity) of the wind. The flags approximate how they would look in the corresponding wind speed. The total range of the scale is 0 to 25 mph.

The wind selector is a wide, red bar with a thin black line through the center. The width of the bar is 3 mph wide (+/- 1.5 mph of the center line).

Drag the red selector to set the wind velocity.

Correction Scale

The correction scale displays the connection to adjust your sights to compensate for the wind velocity and direction. The scale defaults to the calculated wind correction, but can be set to a different value by dragging it left or right.

The blue bar represents the correction range +/- 15 degrees of the selected wind direction. This corresponds to the width of the blue wedge on the Wind Direction gauge.

The red bar represents the correction needed for +/- 1.5 mph of the selected velocity. This corresponds to the width of the red bar on the Wind Flags gauge.


The target serves two functions:

  • Record shots
  • Show the range of impacts if the wind is misread

The blue bar and red bar represent +/- 15 degrees of the calculated correction. The red bar represents +/- 1.5 mph of the calculated correction. The width of the bar is scaled for the target.

If you want to dope the calculated correction, you can drag the wind correction scale left or right. The bars on the target move left or right by the MOA correction selected. To drag the bar, first click the lock button to unlock the position of the scale.

Record a calls and shots

To record calls and shots, tap the screen and press either Call or Shot. Calls and Shots are recorded in pairs, but both don’t need to be entered. If you record a shot after a call, then the call and shot are stored together. If you’re confused, just play with it – it will make sense.

Configure a custom load

In order for High Power Wind Lab to correctly calculate a corrections, it needs to know a little about your load – specifically, the MOA drift for a full value (90 degree), 10 mph wind. This information can be calculated using a ballistic calculator.

From the Select Load screen, click New. Fill out the correction s and a description of your load, and click Save.

You can now select this load from the Select Load screen to use in a shooting session.

If you need to edit a load, click the Edit button the right side of the list item. To delete a load, drag a load to the left to expose a delete button.

Create variations of your load for different altitude, temperature, humidity, and barometric pressure combinations so you can see how these parameters affect wind deflection.

Frequently Asked Questions

1) Is the application legal to use during a match?

No. This app is intended to be a training aid, both on and off the range, to help develop the intuitive understanding of how conditions will affect your shots so you can make better decisions during a match.

2) With the wind pointed at 12 or 6 o'clock, +/- 15 degress shows a potential hit in the 8 ring or wider. This can't be accurate, can it?

The software is very accurate and this is, in fact, what can happen if you misjudge a fishtailing wind. You can verify this for yourself with a ballistic calculator. Set the distance to 1,000 yards, configure your load, and set the wind angle to 15 degrees and wind speed to 10 mph. Compare the MOA offset from the calculator to the blue bar on the target. If you are using the same load configuration in High Power Wind Lab, the end of the blue bar will correspond to the calculated MOA offset. If you want a precise measurement of that point, place a spotter on the target at the end of the blue line.


Is an Android version available?

Affected Platforms: Android
The Android version of the application has been pulled from the Google Play Store. At this time, it is uncertain whether a Android version of the application will be built. These types of apps are time consumer to make for little to no profit. If there is a strong enough demand for the app on Android, it will be considered.