Hi,
i saw blunderbuss dmg and it does same amount of dmg with hit or graze.tooltip dispay will provide more information.One more thing that i dont understand , it writes (MIN).i guess its minimum dmg. if you see targets DT it should not do any damage but seems like it hits like normal hit and bypass all DT.
Edit: and chipher gains enormous amount of focus with 1 hit.she doesnt have any item with focus gain btw.