Read the numbers as a ladder. Of the three rounds the grenade launcher fires, this one sits on the bottom rung: some gun powder and a few metal fragments, no pipe, nothing from a Level 3 chain. The HE grenade above it costs an explosive and a pipe per pair.
None of that helps at the bench. The game lets no player craft or research the round, so there is no blueprint to learn, and the stack you own came off heavy scientists or out of a shop. The launcher's own craft page tells the same story.
So what is the price good for? Deciding what to burn. These are the rounds to fire freely in a close fight, because they are the cheapest to lose and the recycler returns only a pinch of powder. If you want a spread of shot you can actually craft, 12 gauge buckshot is a Level 2 blueprint.
Questions
40mm Shotgun Round ×10: how many resources?
Sulfur ×160, Charcoal ×240, Metal Fragments ×20.
Which workbench does 40mm Shotgun Round need?
Workbench level 3.
How long does 40mm Shotgun Round take to craft?
9 s for one, every step included.
How much scrap does researching 40mm Shotgun Round take?
