The only downside to this abundance of lead is its weight. I recommend having the Heavy Back perk, this enables you to fast travel while being overencumbered. Alternatively, you can also buy shipments of lead from NPCs.
Method 1: Farming Junk Items in The Wasteland
Here’s a list of all the items to keep an eye on for lead: Note: Most items in Fallout 4 take around 7 game-days to respawn. After Madden’s Gym, in General Atomics Galleria, I recommend checking out these other locations: This is their locations on the map:
Extra Tip #1: How To Check If an Item Contains Lead
Extra Tip #2: How To Use Junk Items for Crafting
Tip: Be careful when you use the STORE ALL JUNK option, you might not want to store some junk that is valuable to you.
Method 2: Buy Shipments of Lead From an NPC
If you have the bottle caps to spare, buying from an NPC is the best option for you. You won’t have to carry the weight of the lead because you are buying it as a shipment. It’s a fast method and you won’t have to fight any enemies either. To use the shipment of lead, store it in one of your workshops and when you start crafting the shipment will be converted into single units of lead and used for crafting. This is a list of all the NPCs that sell shipments of lead: And here’s their location on the map of the Commonwealth: