Table of Contents

Welcome to the GRT Community site

GRT has 71,213 active users (78,018 total)

You can download GRT here (no registration needed).



Gordon(†) December 28, 1975 - January 19, 2022



“And there are always traces of your life, thoughts, images and moments. They will remind us of you, make us happy and sad and never let us forget you.”

This website has been frozen in his memory.
Please contact the GRT community for further help and assistance.

A modern professional internal ballistic simulation for reloaders.

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.

Community Friends

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 Afrikaans, Czech, English, French, German, Italian, Polish, Russian and Ukrainian.

Other languages will follow. If you want to help, join our discord server!