Money making guide/Smithing steel cannonballs
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| Requirements |  |
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| Skills | |
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| Items | |
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| Quest | |
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| Other | |
| None | |
| Results | |
| Profit | Experience gained |
| 305,400, after tax |  15,360 |
| Inputs (335,400) | Outputs (640,800, after tax) |
600 ×  Steel bar (335,400) | 2,400 ×  Steel cannonball (640,800) |
After completion of Dwarf Cannon, players can smith steel cannonballs, which is profitable since many players avoid the tedium of smithing them. One steel bar at 559 coins produces four cannonballs worth 1,088 coins total, thus producing 529 coins profit. Depending on which furnace the player chooses, one can produce between 2,160 and 2,400 cannonballs in an hour. That means the profit margin falls between 285,660 and 317,400 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 elite Karamja 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 and output of smithing steel cannonballs. Depending on which furnace the player chooses, one can produce between 4,320 and 4,800 cannonballs in an hour with the double ammo mould. This increases the expected profit per hour to be approximately between 571,320 and 634,800 hourly. However, one must bank twice as often as a result.
At 87 Sailing the island of Grimstone is unlocked, including the Ancient Furnace, which smelts cannonballs at double the rate. After visiting the island for the first time the fairy ring code DLP can be used for quick access to the furnace. You can use Isles to smelt around 8600 cannonballs per hour with the double ammo mould.
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