Terms and disclaimer
Range Twin is operated by Primox. The Primox Terms of Service govern your use of this site. The accuracy disclaimer below is specific to the ballistics tools and the simulation on this site.
Accuracy disclaimer
The calculators, simulators and the shooting simulation on this site are models. They are provided as is, with no warranty of any kind, and with no guarantee of accuracy, correctness or fitness for any purpose. They may contain errors.
Do not rely on any output of this site where an incorrect ballistic solution could create a hazardous or unsafe condition. A firing solution produced here is an estimate from a model, not a measurement. Confirm everything against your own verified data before acting on it. Real-world use is entirely at your own risk.
Nothing on this site is load data or reloading guidance. Always follow published data from a reputable powder or component manufacturer, and work up loads safely.
The simulation is a game
Range Twin's practice and competition modes are a wind-reading game. Scores, leaderboards and rankings reflect performance inside a simulation and are not a measurement of anything in the physical world.
Open-source attribution
Range Twin is built on BallisticsToolkit, copyright 2025 chasep255, used under the MIT licence. Read the full MIT licence text, or the third-party notices.
Questions
Contact info@primox.net.