Power factor is designed to help keep the playing field equal in USPSA divisions around ammunition performance and firearm recoil. The Power factor calculation is an effective way to measure ammunition's relative performance from a competitor's firearm and group them into Major and Minor…

In USPSA and SCSA competitions, divisions group competitors by equipment and require them to adhere to a consistent set of rules during competition. There is a specific division that covers almost every type of commercially available semi-automatic pistol caliber firearm.