This weeks challenge requires you to find a Bolt-Action Sniper Rifle and do 200 damage. The main problem here is to find a Bolt-Action Sniper Rifle in the first place. Since there are no specific locations you can go to and grab one you have to rely on luck for the most part.
These Bolt-Action Sniper Rifle in Fortnite can generally be found in Vending machines and chests. If you are going for the vending machines check out the following map created by fortniteintel.com
If you want to grind through chests I have a route in the video that gives you around 12 chests in about 2 minutes. It starts at the Lonely Lodge Tower and end next to the Lodge itself. Since the odds for the Bolt-Action Sniper Rifle are so slim it can still take several matches to find one. So don’t get frustrated, it will turn up sooner or later.