During a convoy attack I fire a couple off at a DD. The 1st one hit a merchant(sank) instead of the DD. After the crew had reloaded, I came up the PS depth about ~800m from a "dead in the water" C3 which I had hit earlier. I manuvered the boat for another at the DD shot, fired, then pulled down the scope. I didnt hear any detonation

Kinda wish I had the event cam on, bet I could have seen my sub while the Eel was chasing the DD
2 other notes added here, cause I'm feeling lazy.
1. There is a range mod for the G7e at Subsim
2. The German built a huge 1000kw transmitter which repeated all messages sent on short wave. These messages could be received by a u-boat at PS depth or deeper anywhere in the world