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Rune cannonball is 709 gp on the OSRS GE (insta-sell 686 gp). ~81.5K/day · members. Up 2% on its 24-hour average.
Buy limit: 11,000 every 4 hours.
High alch: 840 gp.
In game it is examined as “Ammo suited for a boat's cannon.” Rune cannonball is members-only, so a membership is needed to trade or use it. The base game value is 1,400 gp, which is what shops price from rather than what players pay.
The Grand Exchange lets one account buy 11,000 every 4 hours. That is a generous limit, so the market rather than the limit is usually what caps a position here. Filling it once costs about 7,799,000 gp at the 709 gp price recorded on 11 October 2026. The limit is per account and resets on a rolling 4-hour timer.
Selling at 709 gp costs 14 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 Rune cannonball into 840 gp. With a nature rune at 142 gp that only pays below 698 gp, and Rune cannonball is 709 gp — so alching it loses 11 gp a cast right now.
Rune cannonball sees about 81.5K trades a day, which makes it steadily traded — an order priced at the spread normally fills the same hour. That is roughly 7 times the 11,000 buy limit.
How much is Rune cannonball in OSRS? Rune cannonball is 709 gp on the Grand Exchange as of 11 October 2026, with an insta-sell of 686 gp. The chart above is live.
What is the buy limit for Rune cannonball? 11,000 every 4 hours.
Can you high alch Rune cannonball for profit? Not at the moment — the alch value is 840 gp and a nature rune costs 142 gp, so it only pays below 698 gp.
Do you need members for Rune cannonball? Yes, Rune cannonball is members-only.
Related: Steel cannonball·Iron cannonball·Bronze cannonball·Adamant cannonball
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