LukeFF,
Had the exact same thing. (hmmm should have said similer thing)
Fired 2 torp's at a minelayer and got:
-Premature explosion
-Premature explosion
Fired 3 torp's at a merchant and got:
-Dud
-Hit
-Hit
Wanted the 3 merchants so I went for the DD (who came to a full stop) and fired 5 fish to her and got 5 premature explosions,
5 of them!!!
distances of 1500yrds, 1200yrds and last torp I fired at 800yrds (she didn't move a inch).
Must have gotten bad Torps from the same bunch as you had. (you stationed at Java?)