TexasCHLforum.com

A Youtube video (in English) describing GRT.

https://www.youtube.com/watch?time_cont ... e=emb_logo

Be sure to check out the OBT tool added in this latest beta. Nice touch.

An example screenshot of the main GRT screen.

For some reason, internal ballistics programs don't seem to be as popular in the US as Germany. I use QuickLOAD and find it a very useful tool. Gordon's Reloading Tool (GRT) is in the early stages of development but I like the interface better than QL. It has a lot of promise. What they need now is more data (brass, bullet geometries and muzzle velocities. Pressure trace data if you have it) especially on US powders to refine/develop their models.

Go check out their website.