The game cares about intent, though we acknowledge that the '->' symbol does not always have the same meaning. In this case, whichever player was targeted for the damage with Scouting Mission is the one that gets to draw the cards, regardless of whether Holomatter Projector
or Reflect Damage
did something with that damage.
No. Reflect Damage
is the source of the reflected damage, so Holomatter successfully blocks that reflected damaage.
If you send Scouting Mission against your own Ulta Magnus Armor, do you draw cards.