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Welcome to the GRT Community site
GRT has 71,215 active users (78,018 total)
A modern professional internal ballistic simulation for reloaders.
- GRT is free software and powered by our community via Patreon: https://patreon.com/gordonsreloading
- Chat with us on our Discord-Server: https://discord.gg/3FEYWG4
- Gordons Reloading Channel on Youtube: https://youtube.com/gordonsreloading
Language Dedicated User Groups
If you have a user group or forum dedicated to a specific language, then you can let us know and we will add the link to the list below.
- German: https://www.wiederladeforum.de
Overview
GRT simulates the behaviour of a modern nitrocellulose based powder and projectile inside a barrel.
From reloaders for reloaders. It's free!
A lot of stunning features for your daily use as a reloader. Yes! The software is free of charge. All you have to do is create a login and download.
Databases
Extensive databases help to find the right powder, bullet or caliber specification to build your charge on.
Measurments, Pictures, Notes
You can add additional information to your load file, like measurements.
GRT can import data from various chono's like MagnetoSpeed, Caldwell, ProChrono, Labradar, PressureTrace II. With Labradar GRT features the tracking analysis diagram which can be displayed too.
Pressure Measurement Overlay
GRT lets you overlay a real world pressure measurement onto the simulation diagram!
GRT currently supports the import and overlay of measurements from the PressureTrace II system from RSI.
Shot Group Analysis
GRT can analyse and calculate your shot groups!
Cartridge Designer
GRT lets you create a WildCat or a new Cartridge!
Multilanguage Support
GRT is currently available in English, German, French, Czech, Polish, Afrikaans, and Ukrainian.
Other languages will follow. If you want to help, join our discord server!