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Fully modernized and optimized for 64-bit Excel — Summer 2026

Please note: Development and support for the 32-bit and Excel 2003-2013 versions of BfX have been discontinued. All files below require a modern 64-bit version of Microsoft Excel.
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Rifle Cant Math
 Latest recompilation: August 2026
All workbooks and scripts are designed exclusively for modern 64-bit Excel environments. 		Stats
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Automatic Install

Obtain the setup file (zipped), unpack it and run BfXSetup64.exe. It will seamlessly install the add-in for you.

Download BfXSetup64.zip

For installation instructions look here. 		27-8-2026 23:05:05 2509 Setup
Download of bfx64.xll makes sense if you just want to replace the installed one with a newer version manually. Not necessary to download this if you use the automatic installer above.

Download bfx64.xll

For installation instructions look here. 		27-8-2026 23:02:48 1141 File
What Do I Shoot Today (WDIST) - Simulator

This comprehensive workbook serves as an advanced simulator allowing you to estimate and model your results for multi-distance, multi-target matches (e.g., the NRA 90-shot full bore regional match course). The simulation effectively factors in variable wind conditions, equipment accuracy, and shooter proficiency to provide reliable outcome predictions.

Download the Simulator Workbook (zipped).
16-8-2026 23:06:00 246 Simulator
Determine Your Own Ballistic Coefficients (Essential for PRS)

For Precision Rifle Series (PRS) competitors and long-range shooters, relying on factory BCs is rarely enough. This straightforward workbook allows you to calculate your own exact ballistic coefficients based on real-world velocity loss measurements. Take control of your data and true your ballistics precisely to your specific rifle and load combination!

Download the BC Calculator Workbook (zipped).
4-5-2010 9:15:24 784 BC Simple
Getting Started. This Excel Workbook (zipped) provides a detailed, practical demonstration of exactly what each bfx_ function is designed for and clearly illustrates how to implement them in your own calculations. 31-8-2026 23.05.01 1551 Excel
What are the sight settings for a given distance?
This (zipped) Excel Workbook shows you how to calibrate your iron sights and compute ballistic tables for your rifle. 		4-5-2010 17:17:00 1024 Carry Handle
How can I calculate my rifle-scope settings?
A calibration procedure for rifle scopes and the generation of associated ballistic tables is explained in this Excel Workbook (zipped). 		4-5-2010 17:52:22 1344 Rifle Scope
I need the BfX declarations for my Visual Basic for Applications (VBA) program!

This text file contains all the necessary VBA interface declarations to interact with bfx64.xll. 		VBA
Note: VBA workbooks require macros to be enabled. Show me an example of a BfX VBA program?
A nice interactive ballistic calculator created with VBA and BfX shows you how to program in VBA. A worksheet performs exactly the same calculations.

Download the Calculator Workbook 		30-5-2010 9:50:26 629 Calculator
Looking for a rather advanced VBA program?

This Excel Workbook shows how to use the measured height of a bullet path to determine the ballistic coefficient and muzzle velocity of a bullet. Rather advanced usage of Excel, BfX and VBA. The important Solver Add-in is used (zipped). 		4-5-2010 17:17:00 770 Velocity
Show me how Solver can be used with BfX VBA?

Find with a VBA procedure the ballistic coefficients for bullets listed in a table that also contains down range velocities. Download this Workbook (zipped).

The table contains a list of ballistic coefficients (G1, RA4) for rimfire cartridges. 		5-5-2010 9:19:52 770 Fitted BCs
This workbook is a simple example of the use of the interpolation function bfx_i and its VBA equivalent vb_bfx_i.
Download this Workbook (zipped). 		14-1-2011 14:40:28 456