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Temperature Sensitivity Planner

Estimate how much your muzzle velocity, power factor, and energy will change as temperatures move away from your baseline chrono data.

Enter the average chronograph velocity measured at the baseline temperature.

Chronographed velocity at your known baseline temperature.

Optional projectile weight used to estimate power factor and muzzle energy at the new temperature.

Optional. Adds power factor and energy estimates.

Enter the ammunition or ambient temperature associated with the measured baseline velocity.

Temperature when you gathered the baseline velocity.

Enter the field temperature for which you want to estimate velocity. It uses the same unit selected for baseline temperature.

The range or field temperature you want to prepare for.

Enter the velocity change per 10 temperature degrees. Use your own controlled chronograph results or manufacturer data; the value is treated as a linear estimate.
fps per 10°F

Use a value from your powder tech sheet or your own chrono notes. Many rifle powders move 8–20 fps per 10°F.

Optional spacing between temperatures at which the planner recommends collecting confirmation chronograph data.

Optional. Suggests temperature anchors for confirming your data.

Predicted velocityBaseline velocity adjusted by the entered temperature difference and sensitivity rate. — —
Power factorPredicted bullet weight times velocity divided by 1,000. Shown only when bullet weight is provided. — —
Muzzle energyPredicted kinetic energy from bullet weight and forecast velocity. Shown only when bullet weight is provided. — —

Summary

What to expect

Use this forecast to plan a confirmation ladder or adjust holds.

Enter your baseline and temperature shift to generate guidance.