Cervid Ballistics

Air Rifle, Rimfire & Centrefire

📚 Guide

Unit System

Quick Presets

Sort by calibre Restore defaults

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⬇ Export presets ⬆ Import presets

Firearm & Load

Calibre / Cartridge

Bullet Weight (gr)

BC (G1)?

BC (G7)? optional — used automatically when Drag Model is G7

Muzzle Vel. (fps)

Scope Height (in)

Zero Range (yd)

Max Range (yd)

Interval (yd)

Zero Offset – Elevation (optional) ?

Zero Offset – Windage (optional) ?

Spot Range (yd) ◆ single extra row

Drag Model?

Projectile Shape (approx. gyro stability correction)

Diameter (in)

Length (in)

Twist 1:X (in)?

Twist Direction (for spin drift)

Environmental ?

Capture Weather fills these fields with current conditions at your location (your browser will ask permission). You can edit any value afterwards.

Altitude (ft)

Temp (°C)

Humidity (%)

Pressure (inHg)

Wind Speed (mph)

Wind Clock (hr)?

3=from R (correct R), 9=from L (correct L)

Wind at Target (mph, optional)? Reset

Wind at Target Clock (hr)3=from R (correct R), 9=from L (correct L)

Location (Coriolis)

Latitude (°N)

Azimuth (°)?0=N 90=E 180=S

Angle

Shooting Angle (°) — uphill positive

Trajectory Truing ?

Validation Range (yd)

Observed Holdover

Holdover Unit

Verify Second Point ?

Verify At (yd)

Observed Holdover

Fit BC from Doppler Data Advanced

If a Doppler radar chronograph measured this bullet's actual velocity at many points down range from a single shot, paste that data below to fit the single most accurate BC across the whole string — a far stronger fit than one holdover reading, since every point comes from the same shot under the same conditions. This sets the same BC multiplier as True Trajectory above (only one can be in effect at a time) and uses whichever conditions are currently Calculated, exactly like it.

Distance Unit

Velocity Unit

Column Order (as pasted below)

Paste Data (one pair per line — comma, tab, or space separated)

Import Chronograph Shot Log Advanced

Paste a full shot-string export from a chronograph that reports its own per-shot BC estimate alongside velocity (currently recognises the FX True Ballistics Chronograph's own log format — a per-shot "T-BC(model): value" reading, any number of shots). Every shot in the log is averaged into one Muzzle Velocity and one BC figure, the same way averaging several ordinary chronograph readings gives a more reliable velocity than trusting any single shot.

Paste Full Log (header, weather line, and all — only the shot rows are read)

Getting Started

Select a Quick Preset or configure your load, then tap Calculate Trajectory

Safety & Disclaimer
This ballistic calculator provides estimates for informational purposes only. Results may vary due to ammunition, equipment, environmental conditions and other factors. Do not rely on calculated data as a substitute for verified range data or safe shooting practices.

Always handle firearms and airguns responsibly, follow established safety procedures, positively identify your target and what lies beyond it, and comply with all applicable local laws and regulations.

The guide within the app contains valuable insights into the features contained within the ballistic calculator and how the physics engine creates firing solutions.

Send feedback to ballistics@cervid.net

© Copyright 2026
Fishstone Limited

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Cervid Ballistics

Precision ballistics for air rifle, rimfire & centrefire

Cervid Ballistics goes beyond a simple drop chart. The trajectory engine accounts for weather, atmospheric density, Coriolis effect, angle, spin drift, and probability of hit — the same variables serious long-range competitors rely on. Whether you're dialling a centrefire at 1,000 metres or shooting a rimfire or air rifle over multiple distances, Cervid gives you the confidence that comes from a complete firing solution.

After creating a free account, your loads, presets, and settings are backed up automatically and available on every device you sign into.

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📝 Loader's Journal

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Reticle View

HUD (Head Up Display)

Probability of Hit Advanced

Measure from Photo

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