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The drag model used for the BC value (G7 is preferred for long range).
A descriptive name for this specific ammunition.
A measure of the bullet's aerodynamic efficiency.
The exact distance at which your rifle is perfectly zeroed.
The model or style of the projectile (e.g., BTHP, ELD Match).
The physical weight of the bullet, measured in grains.
The rate at which the rifling twists, usually marked on your barrel.
Whether your scope's turrets and reticle are in MOA or MIL.
The speed of the bullet as it leaves the barrel.
A descriptive name for your rifle profile.
The measurement from the center of the bore to the center of your scope.
The caliber designation of the rifle chambering.
The adjustment value for a single click of your scope's turret.
Learn how to use the AI Ammo Box Scanner to automatically extract ballistic data from photos of your ammo boxes or charts, including automatic web searches for missing data.
Learn how to earn free Pro time and exclusive badges by inviting friends to Atlas Ballistics.
Range cards are pre-calculated ballistic tables showing corrections at set distance increments. Generate one before heading to the range for quick reference without recalculating.
Free accounts include core ballistics calculations up to 500 yards and 1 rifle profile. Pro unlocks unlimited range, unlimited profiles, weather integration, range cards, and the Ballistics AI.
The Bullet Library contains pre-loaded G1 and G7 BC data for hundreds of popular bullets from Hornady, Berger, Sierra, and more. Use it to quickly populate your profile.
The Ballistic Coefficient (BC) describes how well a bullet resists air drag. A higher BC means less drop and less wind drift at long range.
Pro users get spin drift and Coriolis effect calculations automatically included in their firing solutions — important for extreme long range (ELR) shooting.
Truing adjusts your muzzle velocity to match your real-world impacts at distance, making your ballistic solutions more accurate over time.
Atlas Ballistics supports both imperial and metric units, plus MOA and MIL scope adjustments. Configure everything in the Settings page — changes apply instantly.
The shot log records where your shots landed, along with conditions at the time. Use it to track your performance and build data for truing.
The Solve screen gives you instant elevation and windage corrections. Set your range, wind, and conditions — your firing solution updates in real time.
Rifle profiles save your bullet, gun, and scope data so you don't have to re-enter it every time. Create one profile per rifle or load combination.
Pro users can tap 'Fetch Local Weather' to automatically fill temperature, pressure, altitude, humidity, wind speed, and direction using your device's GPS location.
Atlas Ballistics gives you instant elevation and windage corrections for any range. Set up your rifle profile, enter conditions, and get your firing solution in seconds.