What characteristic sound indicates a squib load in a firearm?

A squib load in a firearm is characterized by a sound akin to a popping noise. This occurs because a squib load is typically the result of a cartridge that does not contain enough gunpowder or fails to ignite properly, leading to insufficient force to propel the projectile out of the barrel at normal velocity. The popping noise is a low-energy sound that differs significantly from the expected sound of a normal discharge, which is typically a loud bang.

In contrast, other sounds associated with firearms do not indicate a squib load. A click sound is often associated with a misfire or a failure to fire entirely, while a bang is indicative of a normal discharge. A whistle is not a sound produced by a firearm during discharge and does not have any relevance to the operation of firearms. By recognizing the characteristic popping noise of a squib load, a shooter can identify a potential malfunction and avoid serious issues that could arise from firing another round in such a condition.