What does 'hang fire' describe in firing sequences?

The term 'hang fire' specifically refers to a situation in firing sequences where there is a delay between the strike of the primer and the ignition of the propellant. This phenomenon can occur due to various reasons, such as the powder being damp or an improper primer seating. The significant aspect of a hang fire is that the round may eventually fire after a pause, which could lead to unexpected and dangerous situations if a shooter is not aware.

Understanding this term is critical for handling firearms safely, as the shooter should maintain caution after the trigger is pulled but before the weapon discharges, ensuring they do not assume the round has not fired yet. This concept is distinctly different from immediate firing, misfires due to faulty components, or overheating barrels, which refer to different types of issues encountered during operation.