What is the term for the failure of a primer to ignite the powder charge?

The term for the failure of a primer to ignite the powder charge is "misfire." A misfire occurs when a round is chambered, and the firing pin strikes the primer, but the primer does not ignite the propellant. This can happen due to several reasons, such as a faulty primer, a damaged cartridge, or issues with the firearm itself.

Understanding "misfire" is crucial for both safety and operational procedures. In the context of firearms handling, misfires require immediate attention and specific protocols to ensure safety. It's essential for a peace officer to recognize and address misfires appropriately, maintaining safety for themselves and others in the vicinity.

The other terms in the options refer to different issues. "Hangfire" refers to a delay in ignition after the primer is struck, while a "squib load" denotes a situation where there is insufficient powder that may result in a projectile being lodged in the barrel. A "defective cartridge" implies a broader category of malfunctioning ammunition, but does not specifically denote the failure of the primer to ignite.