Theoben Rapid Forum

Hello all, can anyone recommend a suitable free software program that provides printable results of data tables and trajectory graphs, that's simple to download to a Windows 10 laptop please?

Thanks, C/



 

Here is an Online External ballistics Calculator....
https://shooterscalculator.com/ballistic-trajectory-chart.php

Stuart

Quote from: Ca_Varminter on November 13, 2025, 06:52:56 PMHere is an Online External ballistics Calculator....
https://shooterscalculator.com/ballistic-trajectory-chart.php

Stuart

Thanks Stuart, which of the "G numbers" should I use for a .22 diablo pellet please G1 to G7?

Thanks, C/

To me Chairgun is still the best & easiest to use, and can still be downloaded free & safe here,
https://uk.hawkeoptics.com/chairgun-and-x-act-end-of-life.html

The only thing it doesn't do is upload new pellets/scope models.

G1, the general drag coefficient should do....

Stuart

Quote from: angrybear on November 14, 2025, 02:47:08 PMTo me Chairgun is still the best & easiest to use, and can still be downloaded free & safe here,
https://uk.hawkeoptics.com/chairgun-and-x-act-end-of-life.html

The only thing it doesn't do is upload new pellets/scope models.

Clicked on that link and thought do i need glasses or is it all blurry.....Spec savers here i come LMAO

Have you tried MERO?

Quote from: Ca_Varminter on November 14, 2025, 03:40:14 PMG1, the general drag coefficient should do....

Stuart


Thanks, 👍

Quote from: Brooksy on November 14, 2025, 05:38:38 PMHave you tried MERO?

Quote from: Brooksy on November 14, 2025, 05:38:38 PMHave you tried MERO?

No, but Ill take a look thanks.
C/

Anyone tried ChatGPT?

I got it to produce a range sheet from 5 to 100m in 5m intervals. Info in Mrad, turret clicks and cm holdover.
So far I've been pretty impressed. Any discrepancy, and just get it to update the sheet with your corrections.

Not saying this is accurate but a good starting point. Based on
751fps, 8.44gn JSB .177, Ballistic coefficient 0.024
Screenshot_20251223_110723_OneDrive.jpg

Nice post  ;)

Quote from: Treemonkey on December 23, 2025, 11:12:56 AMNot saying this is accurate but a good starting point. Based on
751fps, 8.44gn JSB .177, Ballistic coefficient 0.024
Screenshot_20251223_110723_OneDrive.jpg

Well the graph is wrong, because the line of sight starts off above the  muzzle  ;)

Give it a go @angrybear. See how you get on. I felt the graph axis were wrong as I was expecting to see an arc.
You just have to tell it to change it

I'm happy with Chairgun why would I change just for the sake of it ?