You can find more ammunition than the normal post-holocaust survivor. This perk will double the amount of ammunition found in random encounters.
Fallout 3
You will find considerably more ammunition in containers than you normally would.
Notes
This perk will not affect killed enemies or containers in locations that were visited prior to taking the perk, as these containers are filled when first encountered.
In most cases, this perk will double the maximum amount of randomly generated ammunition available in newly encountered containers. Each new ammo item has the same 75% chance of spawning as the original ammo leveled lists.
Fallout: New Vegas
It is functionally identical to the Fallout 3 version of the perk, however with options of recycling ammunition its usefulness could be debated when applied to certain characters.
Notes
This perk will not affect killed enemy corpses or containers in locations that were visited prior to taking the perk, as these containers are filled when first encountered.
In most cases, this perk will double the maximum amount of randomly generated ammunition available in newly encountered containers. Each new ammo item has the same 75% chance of spawning as the original ammo leveled lists.
Fallout 4
“You find more ammunition in containers.”— Rank 1 description