Ballistic calculators have long promised precision, but many still rely on simplified models that smooth over how bullets actually behave in flight. Barnes Bullets and Sierra Bullets think that gap is finally small enough to close.
Their new mobile app, TrueData, takes a data-first approach to external ballistics, anchoring its solver in Doppler-radar measurements rather than generalized drag assumptions. Instead of leaning solely on traditional G1 or G7 curves, the app incorporates bullet-specific flight data that reflects how projectiles stabilize and drift across their entire trajectory.
At its core, TrueData functions as a modern ballistics workstation. Users can build and store multiple rifle profiles, fine-tune velocity and ballistic coefficient values based on real impacts, and view shot solutions through a heads-up display that updates instantly as conditions change. Environmental data can be entered manually or pulled automatically via Bluetooth from compatible weather meters, reducing guesswork when conditions shift.
The app also leans into field practicality. Its comprehensive bullet library provides immediate access to manufacturer-verified data for Sierra and Barnes projectiles, including Doppler-measured profiles where available. A virtual rangefinder helps estimate distance during scouting, while target cards and stage timers support structured practice and competition-style shooting. For those using factory loads, Barnes ammunition is already modeled within the system.
TrueData is available now on iOS and Android at no cost. Barnes and Sierra describe it less as a finished product and more as a living platform—one designed to expand as more Doppler-verified bullet data is added.
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