Loadscope vs. ChronoPlotter: Which Load-Development Tool Is Right for You?

ChronoPlotter is free, open-source, and it's earned real trust over the years — it charts your chronograph data and helps you see where velocity settles. Loadscope does more of the job for you: it reads your Garmin Xero directly, measures your target groups from a photo, and scores + names your best load instead of leaving the read to your eye. Here's the honest comparison.

Both tools exist because staring at raw chronograph numbers and trying to call a winner by eye is tedious and error-prone. ChronoPlotter solved that by turning your data into a clean chart. Loadscope takes it a step further and does the calling for you. Which one fits depends on how far you want the tool to go.

What ChronoPlotter does well

ChronoPlotter is free and open-source, it's been around for years, and a lot of sharp handloaders trust it. It imports chronograph files (LabRadar, MagnetoSpeed, ProChrono, and e-target files like ShotMarker), then builds scatter graphs and line charts of your powder charge or seating depth tests — ES, SD, and velocity trend, all from a few clicks. If your chronograph is already on its supported list and you're comfortable reading a velocity chart yourself to find the flat spot, it's a genuinely good, no-cost option.

Where it's limited

• No direct Garmin Xero import yet. Garmin's own FIT file isn't supported — Xero owners have to manually enter data or re-export a CSV from the phone app as a workaround. If you shoot a Xero, that's an extra step every session.
• You still read the chart yourself. ChronoPlotter graphs velocity and helps you spot where things flatten out, but it doesn't weigh SD, group size, and mean radius together and name a winner — that judgment call is still yours.
• No group measuring. Chronograph data only. Measuring your target groups — size, mean radius, point of impact — happens in a separate tool or by hand with calipers.
• No DOPE or range card. Once you've picked a load, building the dial chart is a separate step.

What Loadscope adds

• Reads your Garmin Xero over USB — plug the chronograph into your Mac or PC and Loadscope reads the sessions (Garmin's own .FIT files) straight off the unit, then asks which ones belong to the ladder you just shot. No CSV workaround, no manual entry, no exporting one string at a time. If you'd rather use the ShotView export, that imports too — both routes work. LabRadar, MagnetoSpeed, and more are supported as well.
• Measures your target groups from a photo right in the app — group size, mean radius, point of impact. No calipers, no separate target software.
• Scores and names your best load — it weighs the velocity flat-spot, SD, mean radius, and vertical across every charge and seating depth you tested, instead of leaving you to eyeball the chart.
• Predicts your DOPE and prints a pocket range card for the load it calls, and carries it to your phone.

So which is right for you?

If your chronograph is already supported, you're comfortable reading a velocity chart yourself, and free matters more than convenience, ChronoPlotter is a solid, proven choice — no reason to spend money you don't need to. If you shoot a Garmin Xero and you'd rather the tool read your data directly, measure your groups too, and actually call your best load instead of leaving that read to you, that's what Loadscope was built for.