Shoot to Loot is a trait in Destiny 2 that can appear on 75 weapons. There is also an enhanced version with a stronger effect.
What Shoot to Loot does
Shooting an Orb of Power picks it up. Shooting an ammo brick picks it up and automatically reloads all of your equipped weapons from reserves.
Enhanced version
Shooting an Orb of Power picks it up. Shooting an ammo brick picks it up and automatically reloads all of your equipped weapons from reserves. Increases range.