Ultracite 2mm electromagnetic cartridges are the lifeblood of powerful endgame weapons like the Gauss minigun and Gauss shotgun with prime receivers. Running out of this high-damage ammo can grind your wasteland rampage to a halt. Fortunately, with the right perks, farming strategies, and crafting optimizations, you can keep a steady supply flowing. This guide covers every reliable method to maximize your Ultracite 2mm ammo drops and production.
Understanding Ultracite 2mm Ammo
Ultracite 2mm ammo is a variant of standard 2mm electromagnetic cartridges, enhanced with ultracite to deal bonus damage against scorched and scorchbeasts. It is only used by weapons equipped with a prime receiver, which also boosts base damage. This ammo type cannot be looted from random enemies in the open world (except in specific contexts), and it rarely appears in containers. To get it in quantity, you must either craft it yourself, earn it as contextual ammo from Daily Ops and Expeditions, or convert other ammo you don’t use.
Crafting Ultracite 2mm Ammo
Crafting is the most direct way to produce large batches. To craft Ultracite 2mm ammo, you need to know the plan for the Prime Gauss minigun receiver, Prime Gauss shotgun receiver, or Prime Gauss pistol receiver. Once learned, you can craft it at a Tinker’s Workbench under the “Ultracite Ammo” category.
Required Materials
Each batch of 27 Ultracite 2mm rounds (base yield without perks) requires:
- 5 Ultracite scrap
- 10 Lead
- 15 Steel
- 2 Gunpowder
Ultracite scrap is the rarest component. You can obtain it by smelting Ultracite ore (found in the Cranberry Bog, particularly around Fissure Site Prime and the Glassed Cavern), looting scorchbeast corpses, or scrapping Ultracite weapons and armor.
Perks and Buffs to Multiply Crafted Amounts
Stack these before crafting to minimize material cost per round:
- Ammosmith (Agility): Rank 2 gives +80% more ammo when crafting. This increases the base 27 rounds to 48 rounds per batch.
- Super Duper (Luck): Rank 3 gives a 30% chance to double any craft. This applies to ammo crafting, often netting you a free extra batch.
- Ammo Factory Legendary Perk: At rank 4, it adds +150% more ammo when crafting, stacking multiplicatively with Ammosmith. Combined with Ammosmith 2, your 27-round base becomes around 121 rounds per batch before Super Duper procs.
Always equip these perks when crafting ammo, then swap them out afterward to free up perk space.
Farming Ammo from Daily Ops and Expeditions
Daily Ops and Expeditions (The Pitt) use a contextual ammo system: enemies you kill have a high chance to drop ammo for the weapon you currently have equipped. This is the most efficient way to farm Ultracite 2mm ammo without spending materials. Each enemy killed with a primed Gauss weapon will drop a small amount of Ultracite 2mm ammo, often between 2 and 20 rounds depending on the enemy type and your luck. The final reward screen also grants a large chunk of contextual ammo for the weapon you held at the end of the mission.
To maximize yields:
- Always use a weapon that consumes Ultracite 2mm ammo. A Gauss minigun or Gauss shotgun with a prime receiver works best because they kill quickly and guarantee Ultracite 2mm drops.
- Run Daily Ops with the “Uplink” mutation if possible; enemies swarm predictable locations, making ammo farming easier. Decryption can also work but may be slower.
- In Expeditions, focus on areas with dense enemy spawns, like the Foundry or Union Dues finale.
- Use area-of-effect damage (e.g., a Two-Shot Gauss minigun or explosive legendary effect) to tag more enemies and potentially increase drops per kill.
A single Daily Op or Expedition run can net you hundreds of rounds if you use the right weapon throughout. Many players start a run with just a few rounds and finish with thousands.
Using the Ammo Converter
The Ammo Converter, unlocked via the Raiders faction or from the Atomic Shop, lets you exchange unwanted ammo types for points, which you can then spend on desired ammo. While Ultracite 2mm ammo is not directly purchasable from the converter’s default inventory, you can use it to stockpile other common ammo types (like 5.56 or .45) that you then convert into points; or if you have a friend who can craft Ultracite 2mm, you can give them excess ammo to convert and craft for you. However, the Ammo Converter’s interface is clunky and the exchange rate is poor, so it’s not the primary method. It’s best used as a supplemental way to offload ammo you’ll never use.
Other Tips for Maximizing Ultracite 2mm Ammo
- Looting Scorchbeasts: While normal enemies don’t drop Ultracite ammo, scorchbeasts can drop Ultracite scrap and occasionally Ultracite ammo if you’re lucky. Farm scorchbeasts in the Cranberry Bog, especially during the “Line in the Sand” event.
- Player Vending: Check player camps. Some high-level players sell Ultracite 2mm ammo for 1 cap per round. If you have caps to spare, this can be a quick way to refill.
- Treasure Maps and Holiday Gifts: Ultracite 2mm ammo can sometimes be obtained from treasure map dig sites or from opening holiday gifts/pails during seasonal events. These methods are random but can provide a decent stockpile over time.
- Ammo Efficiency Perks: Use perks like “Gunsmith” or “Luck of the Draw” to reduce weapon condition degradation and occasionally repair the weapon when hitting an enemy, indirectly saving ammo. Additionally, the “Concentrated Fire” perk in Perception can increase accuracy, reducing missed shots.
- Trading with Friends: If you have a dedicated crafter friend, trade them the materials and ask them to craft using their maxed-out Ammo Factory, Ammosmith, and Super Duper perks. You’ll get vastly more ammo per material investment.
Advanced Farming Strategy: The Daily Ops Loop
For sustained ammo generation, adopt this loop:
- Start a Daily Op with only a small amount of Ultracite 2mm ammo (around 50-100 rounds) loaded in your Gauss minigun.
- Play through the Op, killing enemies with that weapon. Loot all bodies for contextual ammo drops.
- After the final boss, the completion reward will give you a large chunk of contextual ammo (often 200-500+ rounds).
- Repeat as often as you like. Each run can yield a net gain of 400-1000 rounds depending on efficiency and enemy density.
This method requires no crafting materials and is accessible once you have a primed Gauss weapon. Even a non-legendary Gauss minigun can work with a decent build.
Frequently Asked Questions
Can you buy Ultracite 2mm ammo from NPC vendors?
No, NPC vendors do not sell Ultracite 2mm electromagnetic cartridges. You must craft them, earn them from contextual ammo, or trade with other players.
What is the best weapon to use for farming Ultracite 2mm ammo in Daily Ops?
The Gauss minigun with a prime receiver is the top choice because of its high fire rate and large magazine, allowing you to tag many enemies quickly. A prime Gauss shotgun is also effective if you prefer a different playstyle, though its ammo consumption is lower, leading to slightly less return per enemy killed.
How much Ultracite 2mm ammo can you get from one Daily Op run?
With a Gauss minigun and efficient tagging, you can expect a net gain of 400 to 1000+ rounds per run, depending on the mutation, enemy type, and how many enemies you personally kill.
Does the “Scrounger” perk affect Ultracite ammo drops?
No, Scrounger only affects regular ammo found in containers. It does not influence contextual ammo drops from enemies in Daily Ops or Expeditions.
Can you farm Ultracite 2mm ammo from non-prime weapons?
No, contextual ammo drops are tied to the weapon you are actively using. If you use a non-prime weapon, you will receive standard ammo for that weapon, not Ultracite 2mm. Always have your prime receiver equipped when farming.
Is it worth using the Ammo Converter for Ultracite 2mm?
Generally no, because the Ammo Converter does not directly offer Ultracite 2mm ammo. However, you can convert excess ammo into points and then buy standard 2mm ammo to trade or use in a non-prime Gauss weapon, but it’s inefficient for obtaining Ultracite 2mm specifically.
What is the most material-efficient way to craft Ultracite 2mm?
Use Ammosmith rank 2, Super Duper rank 3, and Ammo Factory legendary perk rank 4. These combined amplify the base 27 rounds per batch to over 120 rounds, greatly reducing the ultracite and lead cost per round.
Where can I find Ultracite ore?
Ultracite ore deposits are primarily in the Cranberry Bog region. Notable locations include inside the Glassed Cavern, around Fissure Site Prime, and at various trenches and craters. Using a Excavator power armor set doubles the ore you collect from a deposit.
Closing Tips
Maintaining a healthy supply of Ultracite 2mm ammo in Fallout 76 boils down to combining crafting efficiency with smart contextual ammo farming. Don’t overlook the power of a well-optimized perk loadout when crafting, and treat Daily Ops not just as a challenge but as your personal ammo factory. With these strategies, you’ll never have to worry about running dry in the middle of a Scorched Earth event again.

