300BLK Dope

Single Zero POI Calculator

Free · Designed for iPad. Not verified for macOS.

Description: BLKDope is a precision ballistic calculator built specifically for .300 Blackout shooters. Calculate trajectories for both supersonic and subsonic loads side by side, with real-time environmental corrections powered by Apple Weather. Features: Compare two loads simultaneously — any combination of supersonic and subsonic G1 and G7 drag models with independent selection per round Miller stability factor and Litz spin drift calculations when bullet length is entered Interactive trajectory chart with pinch-to-zoom, drag-to-pan, and spin drift overlay Detailed dope table with drop, MOA corrections, velocity, energy, and spin drift Factory ammo library — 64 loads from 14 manufacturers with bullet lengths included, ready to load and calculate Save and manage custom load presets Real-time weather integration: temperature, pressure, humidity, and altitude from your location Exportable dope card PDF with full ballistic data Dark mode support Designed for accessibility with full VoiceOver support How it works: Enter your load data (bullet weight, ballistic coefficient, muzzle velocity, drag model), set your zero distance and sight height, and tap Calculate. BLKDope runs a physics-based trajectory simulation and gives you drop, MOA adjustments, velocity, and energy at every yard. Add bullet length to unlock stability factor and spin drift data. Pull live weather from your location or enter conditions manually. Weather data provided by Apple Weather.

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

• New factory load: HSL Ammunition .300 BLK 220gr Subsonic • Corrected bullet length specifications for Phantom Defense Big Brother Rex • Bullet length is now an editable field when creating or editing load presets • Improved speed-of-sound calculation accuracy in humid conditions • Performance, reliability, and code quality improvements

Version 1.5

The developer, Reid Thompson, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Reid Thompson
    Size
    • 902.1 KB
    Category
    • Utilities
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • iPad
      Requires iPadOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 26.0 or later.
    Languages
    • English
    Age Rating
    13+
    Copyright
    • © 2026 Reid Thompson
  • Privacy Policy