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Mithril incendiary cannonball is 693 gp on the OSRS GE (insta-sell 693 gp). ~756/day · members. Down 50% on its 24-hour average.
Buy limit: none on this item.
High alch: 72 gp.
In game it is examined as “Ammo suited for a boat's cannon.” Mithril incendiary cannonball is members-only, so a membership is needed to trade or use it. The base game value is 120 gp, which is what shops price from rather than what players pay.
Mithril incendiary cannonball has no Grand Exchange buy limit, so the only cap on a position is the gold behind it.
Selling at 693 gp costs 13 gp in tax — 2%, rounded down, taken from the seller. A flip has to clear that before it makes anything, and it is the number most margin calculators leave out.
High alchemy turns one Mithril incendiary cannonball into 72 gp. That is less than the 142 gp nature rune the cast costs, so alching Mithril incendiary cannonball always loses money.
Mithril incendiary cannonball sees about 756 trades a day, which makes it thinly traded — an order can sit for hours, and a large one can move the price.
How much is Mithril incendiary cannonball in OSRS? Mithril incendiary cannonball is 693 gp on the Grand Exchange as of 11 October 2026, with an insta-sell of 693 gp. The chart above is live.
What is the buy limit for Mithril incendiary cannonball? Mithril incendiary cannonball has no buy limit.
Can you high alch Mithril incendiary cannonball for profit? No — the alch value is 72 gp and the nature rune alone costs 142 gp.
Do you need members for Mithril incendiary cannonball? Yes, Mithril incendiary cannonball is members-only.
Related: Adamant incendiary cannonball·Rune incendiary cannonball·Steel incendiary cannonball·Bronze incendiary cannonball
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