Hehe, accept the luck. Nothing wrong with getting lucky. It's a quality that was found in RL, especially amongst some of the better (read:lucky bastards) skippers.
A few patrols ago, I fired a spread at a convoy, and one of the torpedoes was a circle runner that sank a DD that was depth charging where I'd fired from. :P
Was it skill? No. Was it BS? Certainly. Would anyone brag about the hit anyways? Oh yes. Yes they would.