Niffelheim

As with a few other trophies, the description of this trophy is misleading and should actually say 2,500 - not 2.500. You don't need to do that much damage with one shot, because it's the cumulative total you need to reach with your long-range weapons. Emphasis on weapons. You don't need to do this with one single long-range weapon, it's cumulative across all your long-range weapons.

You can chip away at this as you adventure along. Make sure you always have some arrows on you (or bullets if you're using the hand cannons) and just be sure to fire off your long-range weapons whenever you can. If you don't have this by the time you've opened up the Portal to Asgard or awakened the Dragon, just roam around in the Dungeons killing the trash mobs until you've reached 2,500 total damage. As soon as you do, the trophy will unlock.