One-Shot-Stop Percentage

It is assumed that a user selecting to carry a concealed handgun for self defense will select the most effective, readily available ammunition.

Ammunition effectiveness for this study is defined by the One-Shot-Stop Percentage.

One-Shot-Stop Percentage is a number highly written about and highly discussed in gun magazines.

Sanow, Marshall, and Fuller are usually associated with this topic and Sanow and Marshall have published two books on the topic (the second book with Fuller). Marshall uses actual street data in determining One-Shot-Stop Percentage. Fuller uses a statistically derived equation in determining the Fuller Index which is an estimate of One-Shot-Stop Percentage.

One-Shot-Stop Percentage (Fuller Index) is a number estimating how many assailants will be “stopped” when hit by a One-Shot-Stop Hit.

One-Shot Stop Percentage (Fuller Index) is caliber dependent.

The One-Shot-Stop Percentage (Fuller Index) used in this study for various handgun calibers is: