|Inputs (489,240)||Outputs (881,280)|
|1,080 × Steel bar (489,240)||4,320 × Cannonball (881,280)|
After completion of Dwarf Cannon, players can smith cannonballs, which is profitable since one steel bar at 453 coins produces four cannonballs worth 816 coins total, thus 363 coins profit. Depending on which furnace the player chooses, one can produce between 2160 and 2400 cannonballs in an hour. That means the profit margin falls between 196,020 and 217,800 hourly.
Edgeville furnace is the closest furnace to a bank which has no requirements. The Shilo Village furnace is the closest to a bank but players must pay 20 coins to use it, free with the Karamja Elite Diary. The Prifddinas furnace is the second closest to a bank but this requires the completion of Song of the Elves.
After the completion of Sleeping Giants, the double ammo mould can be purchased from the Giants' Foundry Reward Shop for the price of 2,000 Foundry Reputation. It is highly recommended as it effectively doubles the production speed of cannonballs. This increases the expected profit margin to be approximately between 392,040 and 435,600 hourly.
It is strongly recommended to check the live prices on the Grand Exchange before making large investments in any method.
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