In shooter shorthand, "JB" merges the two giants of external ballistics: (the free online calculator) and Bryan Litz (the author of Modern Advancements in Long Range Shooting ).
Created by James B. Millard, JBM Ballistics is a highly accurate exterior ballistics computer. It doesn't just guess where your bullet will go; it uses complex physics to account for variables that most basic calculators ignore. jb ballistic calculator
| Feature | JB Ballistic (JBM) | Kestrel (with AB) | Hornady 4DOF | | :--- | :--- | :--- | :--- | | | Free | $400+ (hardware) | Free app | | Drag Model | G1, G7, RA4, custom | G7, custom AB | Proprietary 4DOF | | Doppler Validation | Yes (via Litz data) | Yes | Yes | | Offline Use | No (requires web) | Yes | Yes | | Learning Curve | Steep | Moderate | Easy | In shooter shorthand, "JB" merges the two giants
The calculator is only as good as the data you feed it. To get accurate results, you need precise inputs. It doesn't just guess where your bullet will
First, a critical clarification: The "JB Ballistic Calculator" is not a single mobile app or a plastic slide rule. It refers to the ballistic computation methodology and custom data tools developed by of Applied Ballistics (often abbreviated "AB"), in conjunction with the deep dive analytical work of JBM Ballistics (JBM stands for "Jochen’s Ballistic Model," created by Jochen Heister).