So Nate was vaguely talking about some ideas for Boarding torpedoes that never happened.
Boarding torpedoes are notoriously bad. They cost more points and offer no advantage, here is a comparison:
Normal Torpedoes:
Move 30, roll to hit against armor, cause 1 hit and can cause a critical effect
Boarding Torpedoes:
Move 20 (in orks), 15 (in nids), 30 (in sm), roll to hit against armor, and cause a hit and run. They are 5 points more expensive in orks. They can turn, but only in their second move and beyond.
Much much worse...
However I feel that these should be changed to sort of what nate was getting at:
Move 20 (in all races except nids who will still have 15), roll to hit against armor and will cause 1 hit (that can't cause criticals) as well as a H&R attack. Can turn in their second move and beyond.
As these are more expensive, and slower (which matters a lot for shotgun), they basically trade off the chance for a better critical with an auto H&R, and they trade speed for turns in second and subsequent turns. Plus they are more expensive (at least in orks)
I think that this set-up would make them a viable upgrade.