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Ladder Test Analyzer

Paste charge/velocity pairs to highlight flat spots, steep jumps, and smart follow-up charges.

Enter one tested powder charge in grains and its measured average velocity in fps per line. Keep components and firing conditions consistent.

One entry per line. Separate charge and velocity with a comma, space, or tab.

The largest adjacent velocity change that may still count as a flat step. A smaller value finds stricter velocity plateaus.

Max velocity change between adjacent charges to consider it a flat node.

Number of consecutive tested charge points that must remain within the node window before a candidate node is reported.

How many consecutive data points must stay within the window.

Your desired average muzzle velocity in fps. The analyzer uses it to prioritize nearby follow-up charges.

Used to suggest follow-up charges nearest to your goal.

Shots analyzed —
Steepest jumpLargest absolute velocity change between two adjacent charge weights. Investigate abrupt changes and pressure signs before continuing. —
Flattest windowSmallest velocity change found between adjacent tested charge weights. It is a screening signal, not proof of an accuracy node. —
Candidate nodesVelocity plateaus that meet the selected window and minimum-step settings. Confirm candidates with a larger sample and group testing. —

Charge map

Velocity vs. charge

Visualize your steps and spot flat sections before loading confirmation batches.

Recommendations

Next steps

Charge ranges to revisit and follow-up suggestions based on your goal velocity.

  • Paste at least two charge/velocity pairs to begin analysis.

Data table

Step-by-step detail

Sorted by charge weight with velocity deltas between steps.

Charge (gr) Velocity (fps) Delta from prior (fps)Velocity at this charge minus velocity at the previous lower charge.
No data yet. Paste your ladder to see results.