Shooting Position Stability Calculator

Estimate shooting hold stability, group size, and hit probability based on position, skill, wind, and heart rate.

Position (1-4)

Target distance (yds)

Skill level (1-5)

Wind speed (mph)

Heart rate (bpm)

Tab to move between fields

Hold capability (MOA)

1.14

Expected group size (in)3.58

Hit probability on 20" target (%)99.9%

Stability score (0-100)89

Max effective range (yds)1,678

How to Use This Calculator

Select Position: 1=Prone, 2=Sitting/Kneeling, 3=Standing Supported, 4=Standing Unsupported.
Enter Target Distance in yards and your Skill Level (1=Novice through 5=Elite).
Set Wind Speed in mph and current Heart Rate in bpm.
Review Hold Capability in MOA, Expected Group Size in inches, and Hit Probability on a 20-inch target.
Use Maximum Effective Range to determine if the target distance is within your realistic capability.

How the result changes with Heart rate (bpm)

Position (1-4): 1=Prone, 2=Sitting/kneeling, 3=Standing supported, 4=Standing unsupported.
Target distance (yds): Distance to target in yards.
Skill level (1-5): 1=Novice, 2=Intermediate, 3=Experienced, 4=Expert, 5=Elite.
Wind speed (mph): Wind speed in miles per hour.
Heart rate (bpm): Current heart rate (higher = more wobble).

Hold capability (MOA): Estimated shooter wobble zone in minutes of angle.
Expected group size (in): Predicted group diameter at the target distance.
Hit probability on 20" target (%): Estimated probability of hitting a 20-inch target.
Stability score (0-100): Overall stability rating (higher is more stable).
Max effective range (yds): Maximum distance where groups stay within a 20-inch target.

Identify Input Parameters
4 parameters
Position (1-4) = 1, Target distance (yds) = 300, Skill level (1-5) = 3, Wind speed (mph) = 10 = 5 input(s) provided
Calculate Hold capability
Hold capability = (baseMoa * skillFactor) + windMoaContrib + hrPenalty
1.14 = 1.14
Calculate Expected group size
Expected group size = totalHoldMoa * 1.047 * (targetDistanceYds / 100)
3.58 = 3.58
Calculate Hit probability on 20
99.9 = 99.9%