Gordon Reloading Tool (GRT)
Description
Rather than serving as a static load table, GRT simulates the internal ballistic cycle by allowing users to enter detailed cartridge data, including propellant selection and charge weight, bullet dimensions, and other relevant variables. Using these inputs, the program generates projected pressure curves and muzzle velocity estimates. This enables users to assess whether a proposed load remains within acceptable safety margins and to understand how specific changes—such as adjusting charge weight or seating depth—may influence overall performance.
Available Languages
Afrikaans, Czech, English, French, German, Italian, Polish, Russian, UK
Data Overview
General
| Application Format | Available as a .zip download. Requires local installation. Supports Windows and Linux only. |
| Update Availability | (The last officially published stable version of GRT was released in 2021 (often referenced as the 2021.2030 nightly build). It is indicated that this version will not be further developed in its classic form. ) |
| Cross-device accessibility | |
| Price of application | free |
| Price of updates | free |
Data Quality and Transparency
| Overall Cartridge Length | |
| Case Capacity | |
| Barrel Length | |
| Load Density |
Coverage
| Number of Load Recipes | Calculator with an indefinite number of recipe options |
| Number of Bullet Brands | 62 |
| Number of Bullets | 4,267 |
| Number of Calibers | 413 |
| Number of Powder Brands | 18 |
| Number of Powders | 249 |
Additional features
| Load Diary | |
| Velocity Measurement Log |
Calculator options
| Trajectory Calculator / Data | |
| Target Velocity Calculator |
Frequently Asked Questions
No — GRT operates exclusively on desktop PCs, ideally running a Windows operating system.
To obtain the Gordon's Reloading Tool (GRT), you first need to visit the GRT Discord server, where the application is available as a downloadable ZIP file. After downloading, the archive must be extracted and the application installed locally. A Windows PC is required for native installation.
Running GRT on macOS or Linux is feasible only with advanced technical knowledge, as it requires configuring a Windows-compatible emulation or virtual machine environment. In all cases, GRT remains a local installation on a single computer and can only be accessed from that particular machine.
Personal load data can be stored within a local GRT desktop installation, but it resides only on the local PC. Transferring this data to other installations or computers is not straightforward. In the event of a system failure or crash, the data may be lost unless a manual backup has been created beforehand.
The final stable version GRT 2021.2030.NIGHTLY from 2021 remains available on the GRT Discord server. However, no official bullet, caliber, or powder updates have been released since 2021.