I just re-watched The Last Outpost today for the first time in ... well ages ... and the Ferengi marauder's electromagnetic attack took 30% of the Enterprise-D's shields in one pulse.
It wasn't even a weapons attack. Just a pulse to mess with shields.
Just something to keep in mind.
Yeah, but unlike STO real Trek also has a infintley wider variety of stuff that can happen.
I think in this case here we are talking about pure firepower from primary weapons rather than special weapons and devices.
A pity really, i would have loved to see chroniton torpedoes in STO that 100% bleed through shields. :p