(Gameplay) Lucian Ult Doesn't Seem to Apply 400% Damage to Minions

I'm not entirely sure if this is true for multiple games or not, but last game I did the math, and instead of hitting the normal 200-300 damage per hit on minions, the ult damage per bolt on minions turned out to be the same as on a regular champion (barring armor on the champion if they had any), This was fairly annoying, several times in the game I tried to just wave clear under tower to rejoin my teammates and was instead stuck bot lane for another crucial 5-10 seconds. This could potentially stop Lucian players from being able to snipe kills behind a minion wave, or clear the ever so crucial super minion rushes towards the tower, and takes away from Lucian's kit, making him not fit for play. If anyone else has this problem, please share, post, link, whatever you have to do to make sure this makes it to the right people, thanks, and good luck on the Rift!