Peaceful. Precise. Armed.
What “truing” usually does, why it so often makes things worse, and how the Truing Session in my app tries to do it honestly. Spoiler: mostly by refusing to give you answers it doesn’t have. TL;DR (for the attention-challenged) Gauss-Newton Goes to the Range It all started with yet another comrade at the range who […]
Does the BC on the box match what the bullet’s own drag data says? Mostly. Some manufacturers more than others. And there’s a free gift for Hornady shooters at the end. TL;DR (for the attention-challenged) The last post ended on a mildly reassuring note: published G7 BCs and my own numbers agree within 1.4–1.9% on […]
How far can you trust one number, where do you take it from, and is there anything better than G7? I’ve had measured Cd-Mach curves for 183 modern match bullets (Lapua, Hornady, Berger) lying around for a while, which is finally enough data to go after the questions at the heart of modern youth’s preoccupations. […]
Part of the geladen.ch ballistics suite. Successor to the standalone TARAN tool. 1. What this tool is for Every shooter has a number they quote for their rifle. It is almost always wrong, and it is almost always wrong in the same direction: too optimistic. The reason is not dishonesty, it is arithmetic. The traditional […]
The first post ever published on this site said, in its entirety: Migration is in progress. That was a while ago. The migration is over. Here is what came out of it. → https://bc.geladen.ch geladen.ch ballistics — a client-side suite for small-arms external ballistics. Trajectory, hit probability, drag curves, your rifles and your bullets, a […]
A report on replacing a closed-form empirical spin drift formula with a physics-based model, and what happened when the result was checked against an independent, modern measurement source. Disclaimers Disclaimer 1 I am no ballistician. I am no mathematician. I am no physicist. I got my diploma 30 years ago, and my brain has not […]
Nota Bene: this post contains excerpts from the Labradar user manual and quick start guide available at the official site here: https://mylabradar.com/download/. These, contrary to most of the rest of this site, are certainly not under WTFPL; I hope Labradar would not mind me repeating their instructions. 1. Read the Labradar manual, at least the […]
Everything listed here is free and open source software. Enjoy. It all moved: geladen.ch ballistics → https://bc.geladen.ch Everything on this page now lives in one app. Trajectory gives you drop, windage, velocity and time of flight at any distance, with a full 4DOF Modified Point Mass engine underneath when you ask for it. Hit Probability […]
For those who care, this is tabbed data for Trasol solver app review. ScenarL .224 69gr, V0 830 m/s, BC G7 0.171 Dist, m Mach Doppler Trasol JBM+G7 200 1.938 0.6 0.6 0.6 300 1.712 1.5 1.5 1.5 400 1.499 2.8 2.7 2.7 500 1.299 4.3 4.3 4.2 600 1.112 6.2 6.1 6 700 0.96 8.5 […]
Motivations, intentions and disclaimers (brace for impact) This review has been written as a follow-up to this heated and particularly entertaining thread at Sniper’s Hide forums (UPD 2020: since that time, Sniper’s Hide moved back from scout.com to the original domain. As a result, all those moments will be lost in time, like tears in rain. But […]