User blog comment:Willbachbakal/(Champion Rework) Graves, the Outlaw/@comment-8050014-20150212075759/@comment-1330314-20150212234023

I'd tend towards preventing that sort of thing, and on second thoughts I think it might be better to special-case the effect out of Runaan's completely, since you could end up with extra damage per autoattack on your primary target, which isn't the intended effect. The item would still work (each autoattack could shave up to 1 second off of Quickdraw's cooldown), but it shouldn't contribute to any single-target damage increase.