If you’re looking to farm ammo then you might want to build your CAMP next to one of the locations on the map above. The locations are great way to accumulate large amounts of ammo if you farm those locations daily. Ammo is also a great source of caps if you were to sell them in the vending machines at your CAMP.
The map also provides “duffle bags” which tend to contain a great amount of ammo. An amazing perk to have equipped when you’re looking for ammo is the Scrounger perk. If you have this perk card at a Rank 3 you’ll have an “80% chance to find extra ammo when you search an ammunition container.”