It will proc normally the first time (takes too long in my opinion, but whatever), but if I stop firing OR reload, then resume firing right after, the overload rounds will fail to activate. Won’t disrupt champions or stop their health from regenerating. Waiting an extra moment before firing seems to prevent this, but it’s rare to have that kind of time when an Overload Minotaur is charging you, and you need to both stun it and prevent it from recovering all its health. Might happen on other auto rifles, but I haven’t tested any besides False Promises.