|107,500 per hour|
540 x Steel bar (283,500)
2,160 x Cannonball (390,960)
After completion of Dwarf Cannon, players can smith cannonballs, which is profitable since one steel bar at 525 coins produces four cannonballs worth 724 coins total, thus 199 coins profit. Depending on which furnace the player chooses, he or she can produce between 2160 and 2400 cannonballs in an hour. That means the profit margin falls between 107,460 and 119,400 hourly.
Edgeville furnace is the closest furnace to a bank, and it has no requirements, but the others do. Neitiznot is the second closest, but it requires The Fremennik Isles. Port Phasmatys is third and requires two Ecto-tokens for entry unless the player has done Ghosts Ahoy.
It is strongly recommended to check the live prices on the Grand Exchange before making large investments in any method.
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