Cost won't decide this one. Slugs and buckshot share the recipe to the last fragment and the blueprint price too, so learn both at the Level 2 workbench and let the fight pick the shell.
The stack is the catch. Slugs pile half as high, so a full stack is only 320 sulfur worth of gun powder, and an order of one stack gets you half the shells a buckshot stack would. On a roam they also take a slot of their own next to the buckshot.
A sensible split for someone running a pump shotgun across open ground: one stack of slugs for the shot across a field, buckshot for every doorway. Any even number crafts clean, so topping up after a fight costs nothing but powder.
Questions
12 Gauge Slug ×10: how many resources?
Sulfur ×100, Charcoal ×150, Metal Fragments ×25.
Which workbench does 12 Gauge Slug need?
Workbench level 2.
How long does 12 Gauge Slug take to craft?
5 s for one, every step included.
How much scrap does researching 12 Gauge Slug take?
