Easily create clean, customizable charts and graphs of your load development sessions with little to no manual data entry. ChronoPlotter is free and open source, works on Windows and MacOS, and supports most chronographs and e-targets.

© Precision Analytics LLC


Powder Charge

Create scatter graphs and line charts of your powder charge tests. Calculate ES, SD, and identify velocity trends with just a few clicks.

Seating Depth

Tighten your groups by graphing and identifying nodes in your seating depth tests. Analyze shot dispersion using a variety of statistical measures.


Import data files from most chronographs and e-target systems. No manual data entry required. Supports LabRadar, MagnetoSpeed, ProChrono, and ShotMarker.


Latest release: ChronoPlotter v2.2.0
(view release notes)
(view code on GitHub )

Latest posts

ChronoPlotter v2.2.0

In this version: Sighter shots in ShotMarker are now toggleable (and hidden by default) X-axis spacing is now toggleable (and proportional by default) Added support for importing…

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How does humidity affect powder?

You may have heard about a relationship between humidity and bullet velocity either in a book, on a reloading forum, or from a crusty benchrest shooter right…

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About us

ChronoPlotter is owned and developed by Precision Analytics LLC.

Our aim is to serve the sport shooting community by:

  • Creating tools to better analyze load development data, and
  • Performing research to advance the understanding of precision handloading

in pursuit of producing higher quality, more consistent ammunition.