Gadsden Ballistic Calculator icon

Gadsden Ballistic Calculatorv1.7.0

Released August 31, 2026Major

iOS

What changed

  • New featureAdded off-clock wind entry using exact bearings in degrees.
  • ContentNew bullet library with 131 entries from major manufacturers.
  • ContentExpanded true-scale reticle support for Horus, Burris, and other manufacturers.
  • PlatformAdded Bluetooth integration for Kestrel 5000-series weather meters.
  • PerformanceImproved armory backup reliability during file imports.
  • UXAltitude changes now dynamically update trajectory and station pressure.
  • New featureAdded maximum point-blank range calculation to the range card.
  • UXNew Field HUD displays click counts and prevents screen sleep.
  • UXTruing can now be initiated directly from a shot-log entry.
  • PerformanceImproved velocity truing logic to prevent double temperature correction.

Original release notes

NEW IN THIS RELEASE
• Off-clock wind: enter the wind as an exact bearing in degrees, not just the twelve clock positions. A dope card remembers the bearing it was solved with.
• Bullet library for handloaders: 131 bullets you can drop straight into a load, with ballistic coefficients and dimensions taken from the maker's own published data — Berger, Hornady, Nosler, Lapua and Barnes. Every bullet cites its source; we only add one when the maker publishes the numbers.
• More true-scale reticles: the holdover drawing now covers additional manufacturer-published reticles (Horus TREMOR3, Burris SCR 2 Mil and more), each read from the maker's own subtension sheet.
• Sturdier armory backup: importing a backup file can no longer be tripped up by an out-of-range value in a single record.

Reticle holdover drawn from real subtension data: Mil-Dot, Nightforce MIL-XT, MOAR-T, FC-MIL and FC-MOA, Vortex EBR-7C and EBR-2C, Leupold TMR, Kahles SKMR4, Zeiss ZF-MRi, March FMC-1, and the reticles added above. Every other reticle keeps the true-scale holdover grid, labelled so you always know which you are seeing.

Kestrel 5000-series weather meters (beta, Pro): pull temperature, pressure and humidity straight off your meter over Bluetooth instead of typing them in.

ALSO IMPROVED
• The altitude field now changes the trajectory. Station pressure is derived from altitude unless you enter pressure or pull it from a meter.
• Applying a trued velocity is now anchored to the temperature you trued at, instead of being temperature-corrected twice.
• Maximum point-blank range on the range card: the farthest distance you can hold dead-on for a chosen vital zone, and the zero that gets you there.
• True from a logged shot — tap any shot-log entry to open truing with that range and miss already filled in.
• The Field HUD shows click counts and time of flight and keeps the screen awake while you are behind the rifle.
• Clear a truing you no longer trust — a mis-measured drop no longer overrides your published velocity forever.
• A Kestrel reading older than five minutes is refused at the moment you apply it, and the "conditions from Kestrel / live weather" badge clears the moment you edit a value by hand.
• Deleting a rifle no longer leaves scopes and mounts saying they are attached to it.

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Gadsden Ballistic Calculator, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

Data licensed under CC-BY-NC 4.0