I mean, the fact that you technically fire two means your DPS is clocked higher, meaning that the damage is much more. Which also goes into the reasoning by Silver Bullets is just bad once you look at it beyond "oh my god it does more damage when all bullets are fired". More bullets fired and more they're expanded means the more time you also have to use other stuff like mines, set-up C4 and other stuff like Photon Bomb. It's kinda unnecessarily overkill for Soldoros. I kill soldoros with only grenades easily without much trouble. I killed him previously in like 18 seconds with only Flashbangs.