Sig Kilo 2400 Applied Ballistics System – Online Guide

The Kilo 2400 ABS App is a companion app to help you get the most out of your Sig Kilo 2400 ABS Range Finder, as well as to manage weapon profiles, features, and settings. This app allows for remote viewing for firing solutions, atmospheric data, target information, and gun profile management on a Sig Kilo 2400 ABS LRF. This app also provides full access to the custom drag curve library. This page is dedicated to presenting operational requirements, along with the many features and their proper use. The first thing you need to do, when using the application is to connect your Sig Kilo device to make sure the connection is working properly.

PDF User Manual can be found here: Click Here

Device OEM User Manual can be found here: Click Here


Features

The following lists the features of the Kilo 2400 ABS App and gives a brief explanation of what they are/do.  Greater detail along with directions for how to properly use all the features is given below in the instructional sections of this page.

1. Application – The Sig Kilo 2400 App uses the Ballistic Solver built in to Kilo 2400 LRF. All calculations are run on the LRF, and it requires a Kilo 2400 in order to run.  This app also supports the uploading and downloading of gun profiles to a Sig Kilo 2400 ABS, allowing for gun profile development in the field, and the use of the custom drag curve library.
2. Applied Ballistics Engine – The Sig Kilo 2400 runs a Point Mass ballistic solver.  The program integrates the equations of ballistic motion numerically, using a 4th order Runge-Kutta routine at 1000 Hz.  This is a standard way of solving dynamic equations of motion in aircraft and missile simulations.  This particular solver was written by former missile design engineer and current ballistician Bryan Litz.
3. HUD (Ballistic Solution) – This screen provides you with real time information from the Sig Kilo 2400. Included on this screen Is the current Range being reported by the device, as well as the Elevation and Windage hold being calculated. Secondary information being provided here is the current wind speed and direction being used in the firing solution. Muzzle Velocity (properly adjusted for temperature if using a temp table), Temperature, Pressure, Density Altitude, Bullet Energy (At The Target), Velocity (At the Target).
4. Gun Profile Management – Build, Save, Manage, and upload gun profiles to your Sig Kilo 2400.
5. Environment Screen This screen allows you to view and edit current environmental information such as Wind Speed, Wind Direction, Temperature, Pressure, and Humidity.
6. Target Screen –
 From this screen you can view/manage current target conditions. This includes Direction of Fire, Inclination (Angle to the Target), Latitude, Target Speed, and Direction. While most of these are calculated using the built in sensors, some are manual input (Target Speed) or can be over ridden.
7. Sensor Input Override – The user has the ability to override the current onboard sensors, and input their own values. For instance you can set your own temperature, direction of fire, or angle to the target despite what the onboard sensors are detecting. 

8. Custom Drag Models – The Sig Kilo 2400 App comes pre-loaded with the complete custom drag curve library featuring over 530 bullets, and will be updated periodically in the future. 
9. Coriolis Effect, Spin Drift, & Aerodynamic Jump – Are all automatically calculated in the firing solution.
10. Temp-Table – You can specify your load’s powder temperature at the time you chronographed along with the variation of muzzle velocity inside the temp table. The Sig Kilo 2400 will then automatically adjust your muzzle velocity based on its current sensor readings.
11. Ballistic Calibration – Sometimes it’s not possible to accurately determine all the variables required to calculate an exact ballistic solution.  As a result, the Point Of Impact (POI) predicted by the program can be a little different from where the actual bullet hits in the real world.  One of the more powerful features of the Sig Kilo 2400 Device is the Drop Scale Factor (DSF).  A user can calibrate the program based on real world observed drop data at range by inputting pairs of observed range/drop data. This is also how you correct for scope turret errors. While it may seem simple, behind the scenes complex calculations are doing more than just adjusting muzzle velocity. The trajectory is being trued.
12. Dark Theme – A dark theme is used to preserve night vision during low/limited light conditions.
13. Metric Support – Data inputs/output can be configured to use Metric units.
14. Sig Kilo 2400 Specs – For device specs please visit the Sig Kilo 2400 ABS Device Page.

 

Operational Overview

The general flow of the program is designed for quick access to functions you need. Guns are stored on the Sig Kilo 2400, but can also be uploaded to the device from the field. This allows you to make changes on the fly, or to load any rifle on to a device from the field, without the use of a Computer. The following sections cover the details of operation.

  1. Your Sig Kilo 2400 must be paired to your device before you attempt to use this app. (See Kilo 2400 Manual for how to pair your device)
  2. Changing weapons must be performed on the Sig Kilo 2400 itself. You can upload/download gun profiles from this app, but you can only change the gun profile currently in use on the device itself.
  3. For Coriolis to be correct, you must input your Latitude on the Target Screen.
  4. Firing Solution Errors. Most of the time, if the firing solution is wrong, especially in the super-sonic trajectory, it is because of bad information input in to the program. Muzzle Velocity, and incorrect BC being the most common reasons. If you are pointing your own bullets, you can expect the BC to improved, and the firing solution to be slightly off. This can be corrected by altering your own BC, or by using the Drop Scale Factor. Whichever way you decide to do it, keep in mind, most firing solution errors are user induced.
  5. Using a suppressor. If you have a weapon that is suppressed, the easiest way to account for this, is by using the zero height, and zero offset. Zero the weapon with the suppressor on, if that is how it will most commonly be used. Then create a second profile for that weapon. Remove the suppressor and note the offset, input these in to the zero height/offset section.
  6. MV shift with Temp Shift. You do have the option to input a MV Temp Table in the weapon management system. A common error is to only test MV once, and then not account for the shift due to temperature change. One day your firing solution is spot on, then a month later it’s off. Keep in mind powder burn rates change with temperature. This needs to be accounted for.
  7. Turret Tracking Errors (Correcting for Turret Errors): This is accounted for in the DSF. You can input 1 field that is in the super-sonic range of the DSF. All other inputs need to be in the transonic to subsonic range. There is much more going on behind the scenes in the DSF than simply correcting Muzzle Velocity. It is far more complex than it seems. If you need to account for turret errors do it with the DSF function.
  8. Ballistic Calibration: Drop Scale Factor (DSF) is done in the app, form the weapon profile.

 

Main Screen

From the main screen you have quick access to 4 functions. You also have the settings, which can only be accessed from this main screen. Pressing your devices back button from any of the function screens will return you to the Main Screen. NOTE: Before you begin to use this app, make sure your Sig Kilo 2400 is paired.

 

 

Device Pairing

You must pair your Sig Kilo 2400 to your Device BEFORE you attempt to use this app. This process may be different depending on your device.  You can refer to the Sig Kilo 2400 User Guide, and your individual devices instructions on how to pair Bluetooth devices.

To pair, simply click the Bluetooth Symbol at the top center, then select your device from the screen that pops up. On the top of each screen you will have an indicator that says or  to determine the state of your device connection.

 

Settings

The settings are accessed by pressing the settings button in the top right from the main menu.

 

 

Target Engagement

    HUD (Ballistic Solution)

HUD gives you the ability to have a live feed which is updated continuously. You will see Range, Elevation and Windage Solutions in the main portion of this screen. Secondary information is also provided such as the Wind Direction and Speed you are using. This will need to be edited on the Environment Screen if you wish to change it. You will also provide you with the following:

Range Button: Pressing this button will remotely activate the unit telling it to acquire a range measurement.

Muzzle Velocity: This is the current MV in use, however if you are using a MV-Temp Table this is the corrected MV for the current Temp being used.

Temperature, Pressure, Density Altitude: These are the current sensor readings being used and measured.

Energy and Velocity: These are the current Bullet Energy and Velocity at the Target Range.

Overriding Inputs: This must be done on that inputs respective screen. If you want to override environmental information, do it on the environment screen. Same goes for Target Info.

Your currently selected weapon displays at the top of the screen.

Range Button allows the app to override the device, and force a laser ping for range.

 

    Environment Screen

This screen allows you to view, and change environmental factors. Wind is controlled with either the included wind meter, or by manually inputting the direction and speed.

Temperature, Pressure, & Humidity: These are reported and input in to the firing solution with the built in sensors on your Kilo 2400 Device.

Overriding Functions: You can over ride any function with a kilo symbol next to it. By tapping on the yellow Kilo Image it will then flip to a Phone Image. You may then tap on the reading associated with that function and use the keypad to enter your own. Press the Sync button found in the upper right to complete the override.

Side Note: Atmospheric inputs have historically been the least understood and caused the most trouble for shooters running ballistics programs, in particular the pressure inputs.  The following discussion elaborates on the correct way to manage these variables.  Basically there are two options for describing pressure to a ballistics program; 1) Enter the barometric (aka corrected) pressure and altitude, or 2) Enter the Station pressure where you are.  Some definitions are in order regarding barometric and station pressure. 

Barometric pressure is also known as sea level corrected pressure, and is what the weather station and airports report because it’s useful for pilots and making weather assessments.  Barometric pressure is not the actual air pressure where you are, rather it’s a number that’s corrected to sea level.  In order to determine the actual air pressure where you are (which is what the ballistics program cares about), you have to account for the effects of altitude.  However if you have a handheld weather meter like a Kestrel, you can measure Station Pressure directly which is the actual air pressure where you are.  This is the preferred method of inputting pressure data because it’s one less input and relies on only one measurement instead of two.

A common error is to mistake station pressure for barometric or vice versa.  The consequence of this error is that the wrong air density gets applied which degrades the accuracy of trajectory predictions.  This error is increasingly more severe the higher up you are above sea level.

To further clarify the output, we will use an example from the Kestrel user’s manual: “Some final notes – If you wish to know the actual or station pressure for your location (such as for engine tuning), simply set the reference altitude on the BARO screen to “0”.  In this case, the Kestrel Meter will not make any adjustment and will display the measured value. (Engine tuning and ballistics software sometimes refer to atmospheric or station pressure as “absolute pressure.”  These applications are concerned with the actual air density, as opposed to pressure gradients relating to weather, so barometric pressure is less useful.”

 

    Target Screen

This screen allows you to view, and change Target information. This information is controlled by the onboard sensors, however some information must be manually input.

Heading & Inclination (Vertical Angle): These are reported and input in to the firing solution with the built in sensors on your Kilo 2400 Device.

Target Speed & Direction: These must be hand input by the user.

Latitude: This is automatically picked up by the phones GPS Sensors and input. 

Overriding Functions: You can over ride any function with a kilo symbol next to it. By tapping on the yellow Kilo Image it will then flip to a Phone Image. You may then tap on the reading associated with that function and use the keypad to enter your own. Press the Sync button found in the upper right to complete the override.

 

Gun Profile Management

    Gun Creation/Deletion

You have the ability to create, store, and upload profiles to the Sig Kilo 2400 device. This section will cover Gun Management, the next section will cover uploading profiles. The Sig Kilo 2400 can store up to 4 different gun profiles. You will also notice you have the ability to create Temp Tables, to put in your scope click values, and to change from G1 or G7. Note Custom Drag Curves lock out the ability to change this. To delete a profile simply press and hold for 1 a prompt will pop up to delete said profile. NOTE: Always select the bullet first. If you create the weapon then choose a bullet, your weapon profile will be reset. Also if you exit this screen for any reason without saving, your profile will reset. Always save your work before leaving this screen.

   Process:
Create the Profile from Gun Profile Management Menu:
Step 1: Click the + symbol in the upper right of the Gun Profile Management Screen.

 

 

 

Step 2: Click “Library”. It is important that you do this first, if you fill out any information then select the bullet, the data will be erased.

 

 

 

Step 3: Select the bullet from the library that you wish to use. Caliber first, then manufacturer, then bullet.

 

 


Step 4: Select the Custom Drag Model or G1-G7 BC you wish to use. 

To fully understand what a CDM entails please read our article on aerodynamic drag models here: Drag Modeling

 

 

 

Step 5: Input The rest of your data, and don’t forget to save the profile. Save can be found in the upper right corner.

 


    Uploading Profile to Sig Kilo 2400 ABS

Sig Kilo 2400 ABS App has the ability to send (upload) your current weapon profile to a Sig Kilo 2400, and other Applied Ballistic Compatible Devices via Bluetooth. Before you start this process, ensure you have completed you have paired your device. The proper steps are shown and described below for uploading a profile to the Kilo 2400 (or other AB devices).

WARNINGUploading profiles will DELETE the current gun profiles on your Sig Kilo 2400.

   Process:
Gun Profiles should ALREADY be created:
Step 1: On the Sig Kilo 2400 make sure Bluetooth is on, and the K2400 and your Device are already paired. Go to the Gun Profile Management Screen and wait for it to read “Connected”.

 

 

 

Step 2: Check the indicators next to the profiles you want to upload (Maximum of 4). As you select them, each is given a designator. In this case you see Pro1 and Pro2. In the device itself these will be the profile names.

 

 

 

Step 3: Click “Sync” at the top right, it will then indicate as each profile is uploaded, and it will delete all current profiles on the Sig Kilo 2400 ABS.

 

 


Step 4: Go in to the LRF Device Menu, and select which profile you wish to use. (Must be done on the device, not in the app). See the device user manual if you need assistance changing profiles on the device: SK2400 ABS OEM Manual


 

 

    Ballistic Calibration

You have the ability to do a Ballistic Calibration if needed. Please visit here: to read more on this. In order to do a ballistic calibration 2 things must be completed.

1. You must have the Sig Kilo 2400 ABS connected to your Mobile Device.
2. You must have uploaded the profile you wish to do a ballistic calibration on to the Sig Kilo 2400.

   Process:
Connect to the Sig Kilo 2400:
Step 1: Make sure the device is connected, and the profile you wish to upload is already loaded on the device. To see how to upload a profile see the previous section.
 

 

 

Step 2: Tap the sync button on the profile you wish to do a calibration on. 

 

 

 

Step 3: Go in to the profile you wish to do a Ballistic Calibration on. To do this, simply enter the profile just as if you were going to edit it.

 

 

 

Step 4: Tap “Calibrate” in the top right.

Note: If you get the warning message, and it fails to enter the ballistic calibration mode like seen in image 2 here, this means that profile is not on the device, or they are not connected & synced. In which case refer to step 1 & 2.
 

 

 


Step 5: Enter the actual drop of the bullet at that specific range. This is best done in the field, where the device can see the current atmospherics and direction of fire. You input the range to the target, and the actual drop to target.

The first section calibrates the Muzzle Velocity. The second box gives you Drop Scale Factor, and edits the curve of the bullet past the transonic zone. Once complete, you hit calculate. At which point you will see a number show up in the calibration results. If you wish to use this number simply hit “Set MV” or “Set DSF”. At the top of each section you are given the ideal range for that calibration specific to your weapon setup.

At this point you are done, however you can use this feature to create a temp table. For that see the next step.


 

 

    Temp Table Building from Ballistic Calibration

Temp Table Trick. Note this is not a general operation, but is an advanced step. If you are wanting to build a Temp Table using the calibration feature you can. Remember the first block is the MV Calibration Block. To do so:

1. Get the current temp from the Environment Screen.
2. Complete the Ballistic Calibration Process, however DO NOT CLICK USE. Instead press the Back button on your device.
3. Scroll down to the MV-Temp Table, and input the calculated MV and the Temp.
4. Click Save. Make sure the numbers in your temp table are from High to Low as stated in the app.


 

Requirements

  • Android v5.0 or higher or iOS 7.0+
  • Bluetooth Low Energy (BLE) support on the Mobile Device.
  • Region and Carrier Limitations: This app is not approved for all regions and/or carriers at this time. Some carriers may choose to block this app due to the nature of its content.
  • Sig Kilo 2400 ABS

Not Required:

  • You do not need GPS, Internet, or Cell Service to run calculations.