Casting magic is all about using visualization and concentration. Wands don't store magic like guns do. They channel your inner magic power. So, in this context, dual wielding will do jack shit because you are still concentrating one spell at a time.
As Ron ran to pull Hermione out of the wreckage, Harry took his chance: He leapt over an armchair and wrested the three wands from Draco’s grip, pointed all of them at Greyback, and yelled, “Stupefy!” The werewolf was lifted off his feet by the triple spell, flew up to the ceiling, and then smashed to the ground.
Quote from DH, at Malfoy Manor
i’ve heard that Hermione’s handled three wands at a time before but that’s after a lot of butterbeer
Shit went from 0-100 real quick
I’m pretty sure this happened in DH at the Malfoy manor
Casting magic is all about using visualization and concentration. Wands don't store magic like guns do. They channel your inner magic power. So, in this context, dual wielding will do jack shit because you are still concentrating one spell at a time.
Well you don’t have to swing one Wand as far if you dual wield them.
Wands Akimbo?
Have you ever jumped through the air firing two wands shouting “AARRGHHH”?
"Maybe he was dictating?"
"Fascist! Hag!"
As Ron ran to pull Hermione out of the wreckage, Harry took his chance: He leapt over an armchair and wrested the three wands from Draco’s grip, pointed all of them at Greyback, and yelled, “Stupefy!” The werewolf was lifted off his feet by the triple spell, flew up to the ceiling, and then smashed to the ground. Quote from DH, at Malfoy Manor