I think the single torpedo kill of a BOP you're thinking of is in Generations.
I always pretend that what we're seeing in Generations
is a bundle of torpedoes fired at once, since I hope Worf didn't catch a case of idiot from Riker and understands that firing a "spread of torpedoes" doesn't mean just firing one really slow and dramatic one.
The Enterprise-D can fire ten(?) torpedoes at once from a single tube and have them attack multiple targets, so maybe it can fire them all in one big bundle as a kind of super warhead too. The glowy spikey ball of death thingamajig seemed bigger than normal, and moved really sluggishly.