Not that I can tell. I've been on 11 patrols and have yet to be honestly challenged by any escorts. I've taken more damage from running gun battles with armed merchants than I have from depth charges. Japanese destroyers simply don't have the hardware to dish out any serious damage. I once attacked a task force escorted by 4 destroyers, and was able to shake them after just 2 attack runs. I hear that you can attack Bungo Pete in the Bungo Straights and that he kills people pretty consistently.
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