Liquid-propellant guns remained hazardous experiments

Did liquid-propellant guns reach service, and how were their charges meant to be ignited?

No known example reached service; several ignition methods were tested, including electrical firing, but reliability and safety problems kept the idea experimental.

Several attempts were made to use liquid propellant in guns, but no example discussed reached operational service. Pouring a liquid charge behind the shell may sound convenient, yet it creates a hazardous combination of volatile material, chamber pressure, and ignition equipment. A follow-up mentions experiments with several primer arrangements, including an electrical system that reportedly destroyed the test gun. The practical risks outweighed the idea's theoretical simplicity.