[@The 42nd Gecko]

Well unless the wind is being pressed directly against the bullets head on, I'm imagining that the wind that Ceil is whipping up isn't a straight blast but circular "slashes" sort to speak. Tornado and such. Wind that strong will affect things like bullets, so Hibiki is taking that into account while she lines up her shot. Even if the wind is being pressed directly against the bullets, unless the blast is strong enough to fling Hibiki's shot back into her gun, at some point when the bullets start dropping they'll start curving because of the wind. So depending on how strong these winds are to affect the bullet, and if there's any sort of barrier or debris that intercepts Hibiki's shots, she's trying to time it precisely enough to get her shots somewhere near Ceil. Ideally they hit her.

Of course, that mostly relies on the wind being constant and doesn't suddenly shift directions or slow down. It's also why Hibiki shot three bullets, so she can get an idea of her trajectory and such.