McCree's Deadeye Damage

Does McCree's Deadeye damage increase beyond the killshot if you charge it for longer duration than the killshot?

Like for example, if a McCree ults, and holds the ult there for the full duration before releasing it, does it deal more damage as compared to just firing it off the moment he lines up a killshot?

Edit: If McCree manages to accumulate enough damage with his Deadeye, can he potentially destroy Reinhardt's shield and kill the targets behind?

Yes, yes it does. It adds 170 damage for every second you are charging. You can charge it for 6 seconds which adds to 1020 damage in total - per shot.

Edit: Apparently he can break the Shield and the Damage stacks onto it.

• Mcree perspective: https://streamable.com/ewr8?t=23.9
• Reihnardt perspective: https://streamable.com/olim?t=5.9