Originally Posted by Roderick_BR
I don't know if it works that way. When you "shoot" the spell from your weapon, doesn't it cease to exist in there? It doesn't leave a "copy" behind.
Yes, it's gone, but then the other spellblade sends it back. You can keep spells going like this indefinitely, so you can add a Scorching Ray a day to the volley and after a year you can loose 365 Scorching Rays as a free action.