My understanding was that the bullets that were successful against WWI Zeppelin raids were the incendiary Buckingham round not the explosive rounds. Explosive r

My understanding was that the bullets that were successful against WWI Zeppelin raids were the incendiary Buckingham round not the explosive rounds. Explosive rounds refused to detonate on the canvas hull. And if you manged to hit an internal girder it was too deep inside to be near sufficient oxygen. As I recall, the successful bullet was filled with phosphorus and had a small hole that was re-opened as it ran down the barrel when fired. Thus it spewed flame along its whole flight and as it penetrated the Zeppelin hull where hydrogen and oxygen where a good ratio. But as I can find no citation, I must take my own memory with a grain of salt.