Fallout – What items should be saved for turn-ins

Ammo Boxes are essentially a source of cheap bulk ammo. If you'll notice, each one mentions that it's a particular kind of ammunition. If you buy an Ammo Box, drop it on the ground, and then interact with it (Not sure if there's a smoother way to do this, but it's how I figured it out), you'll get a whole lot of ammunition. For reference, the box of Bulk Energy Cells sold by Chet in Goodsprings contains 100 cells. Unfortunately, being Bulk ammo, each one does 85% of normal damage. Good enough for cash-strapped Couriers, but far from ideal.

Also, be sure to distinguish Ammo Boxes from Ammo Cases - the latter are weightless, and are used in crafting for the production of new and specialty ammo.

For the most part, a simple "if it makes sense" rule of thumb applies. For instance, That Gun can be repaired with basically any non-energy handgun. As a rule of thumb, if it uses the same type of ammo, you can use it to repair another weapon with a similar ammo type, along with a few special cases, like a Hunting Rifle with any lever action gun.

Similarly, Light Armor can repair any other Light Armor, Medium with Medium and so forth.