Power Factor Calculator

What is Power Factor?
Power factor is a calculation used in competitive shooting to ensure ammunition meets minimum power requirements. It's calculated by multiplying the bullet weight (in grains) by the velocity (in feet per second) and dividing by 1000.

Why is it important?
The proper power factor for your caliber and weapon type is required if you plan to compete in shooting matches. Using ammunition below the required power factor may result in scoring penalties or disqualification. Higher power factors (Major) often receive scoring advantages in competitions compared to lower power factors (Minor).

All velocity values are in feet per second (fps) and bullet weights are in grains.

About Power Factor Requirements
Below are the minimum power factor requirements for different competitive shooting organizations. These numbers represent the minimum power factor your ammunition must meet to qualify for specific divisions within each organization. Competitors who fail to meet these minimums may face scoring penalties or disqualification.

Major power factor typically gives scoring advantages over minor power factor in competitions. Check your specific organization's rules for current requirements.

Q: What is power factor in shooting?

Power factor is a calculation in competitive shooting that multiplies bullet weight by velocity and divides by 1000. It helps classify ammunition and determine scoring in shooting competitions. The formula allows for a standardized way to compare different types of ammunition across various calibers.

Q: How do I calculate power factor?

Calculate power factor by multiplying the bullet weight (in grains) by its velocity (in feet per second), then dividing by 1000. For example, a 180-grain bullet traveling at 1000 fps would have a power factor of 180. You can use our calculator above to easily compute this for different ammunition types.

Q: Why is power factor important in shooting competitions?

Power factor determines scoring advantages, division classifications, and ensures a level playing field by standardizing ammunition performance across different calibers and weapon types. Different competitions have varying power factor requirements that can affect your scoring and division placement.

Q: What's the difference between major and minor power factor?

Major power factor typically provides higher scoring values for hits, while minor power factor results in lower scoring. The specific thresholds vary by competition organization, such as USPSA and IPSC. For example, in USPSA, major power factor for handguns is 165, while minor is 125.

Q: Do all shooting competitions use power factor?

Not all competitions use power factor, but it's common in practical shooting sports like USPSA, IPSC, IDPA, ICORE, and SASS. Each organization has its own specific requirements and calculations. Some competitions may have different rules or use alternative methods of classifying ammunition.