Cannonball smithing
Turn steel bars into cannonballs. Slow experience, steady profit and one of the most AFK activities available.
Cannonballs are close to the most AFK profitable thing in the game. One interaction with the furnace smelts the whole inventory, and the process takes long enough that you can genuinely do something else.
Demand never dries up because cannonballs are destroyed on use. Every one fired is gone permanently, which is a property very few items share.
Dwarf Cannon is required for the ammo mould, and it is a short quest with light requirements. Do it once and the method is open forever.
The margin per bar is small and moves with the steel price. The appeal is not the rate — it is that the rate arrives with almost no attention.
What you actually do
- 1Buy steel bars in bulk and take them to the furnace in Edgeville or Port Phasmatys.
- 2Use the ammo mould on the furnace and smelt the whole inventory.
- 3Bank and repeat.
Getting the most from it
- It needs Dwarf Cannon completed for the ammo mould.
- This is close to fully AFK — one interaction smelts the whole inventory.
- The margin per bar is small but steady, and demand never dries up because cannonballs are consumed permanently.
Similar methods
Blast Furnace gold bars
Smelt gold ore into bars at the Blast Furnace for the fastest Smithing experience in the game, at close to break-even cost.
- Est. GP/hr
- 0–300k
- Starting GP
- 2m
- Attention
- Hands-on
- Requirements
- 60 Smithing
Cooking raw fish
Buy raw fish, cook it, sell it cooked. A simple processing loop that trains Cooking at the same time.
- Est. GP/hr
- 80,000–250k
- Starting GP
- 200k
- Attention
- Moderate attention
- Requirements
- 40 Cooking
Steel bar smelting
Buy iron ore and coal, smelt steel bars, sell the bars. A simple free-to-play processing loop.
- Est. GP/hr
- 50,000–150k
- Starting GP
- 150k
- Attention
- Moderate attention
- Requirements
- 30 Smithing