Bri Samson · 18 July 2026 · 3 min read

Your normal trajectory data tells you where to aim for a level shot. This Tool calculates only the additional change caused by shooting at an angle.

It compares the same pellet fired level at 0° with the same pellet fired at an angle over the same measured distance. The gap between the two pellet paths is the angled-shot compensation.

Generate your chart

Your previous chart has been restored. You can edit any value below and generate again.

fps
The default of 0.021 is a reasonable starting point for a typical .177 JSB Exact.

You will need

  • your pellet's ballistic coefficient
  • your rifle's muzzle velocity

Why don't I need scope height or zero distance?

The scope isn't missing. It was never part of the question.

This Tool compares one pellet path with another, not a pellet path with the crosshair. Scope height and zero distance describe where the sightline sits in relation to the trajectory. The same sighting geometry applies to both shots, so it cancels from the comparison.

Compare pellet with pellet, and the scope disappears.

Calculated using a UK reference atmosphere of 13°C, 1013.25 mbar and sea-level altitude.

Not sure whether your reticle markings are accurate? Use the Mil-Dot Calibration Checker.

Read the physics behind angled airgun trajectories, including why the effect is practically the same whether the target is above or below you.

Frequently asked questions

Not necessarily. It means the angled pellet path is above the level pellet path at the same distance. Your normal trajectory data still determines where both paths sit in relation to your crosshair.
No. Your normal chart gives you the level-shot aim point. This chart tells you how much to adjust that aim point for angle.
Millimetres make the physical difference easy to visualise and compare with a kill-zone size. MRAD is usually easier to apply as an angular correction.
They determine how quickly the pellet loses velocity and how long gravity has to affect its flight. Use realistic figures for the rifle and pellet combination being charted.

About the author

Bri Samson is the co-owner of Doncaster Airgun Range, a WFTA World Champion in the Piston category, and an experienced HFT shooter and coach.

His articles draw on competitive shooting, practical coaching and years of observing shooters test rifles, pellets and equipment on an indoor range.