It wouldn’t surprise me that there was some truth in this story of planes with no ammo. I know a fellow who flew st.lawrence anti sub patrols early in the war and the hurricanes were never armed on these patrols. If a u boat was spotted they would have to return to base to be armed. He said by the time they ever got to where the uboat was spotted it was all over the RCN had already depth charged the hell outta the spot.