Calculate maximum point blank range for rifle cartridges or custom loads from muzzle velocity, ballistic coefficient, and vital zone size.

MPBR (Rule-of-Thumb) Calculator

The farthest range at which you can hold dead-center on the vital zone and still hit it — no holdover needed.

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MPBR Rule-of-Thumb (Estimator) Formula

The following example shows a rule-of-thumb estimate sometimes used to get a quick, rough MPBR value from muzzle velocity. It is not a true MPBR calculation (real MPBR requires a chosen vital-zone size and a trajectory model that accounts for drag, sight height, zero, and other factors).

\text{Estimated MPBR (yd)} \approx \frac{V_{\text{muzzle}}(\text{fps})}{10}
  • Estimated MPBR is the rough estimate of maximum point-blank range (yards)
  • Vmuzzle is muzzle velocity (feet per second, fps)

To estimate MPBR in yards using this heuristic, divide muzzle velocity in fps by 10.

How to Use This MPBR Estimator

The following steps outline how to use the rule-of-thumb estimator.

  1. Determine the muzzle velocity of the projectile as it leaves the barrel (fps, or convert to fps).
  2. Use the estimator formula above: Estimated MPBR (yd) ≈ Vmuzzle(fps) / 10.
  3. Calculate the estimated MPBR (or use the calculator above).
  4. For a true MPBR, use a ballistics calculator that lets you set the vital-zone size, sight height, ballistic coefficient/drag model, and zero distance.

Example Problem :

Use the following variables as an example problem to test your knowledge (rule-of-thumb estimate).

muzzle velocity (fps) = 3000

Estimated MPBR (yd) ≈ V / 10 = 3000 / 10 = 300