You must do the dwarven cannon quest, so you can buy the cannonball mold. Then all you need is the mold and steel bars. Which you then smelt together.
Yes they are they sell on the Grand Exchange for 185 gp each right now.
I don't think there is. But you can simply click on the cannon to fill it up.
Yes, easily. I wouldn't recommend doing them for experience. I use them for money if I need it. I am currently level 108 in runescape classic and 131 in runescape 2. I would recommend buying 2000 cannonballs and using a cannon there. It costs around about 715k for the balls but you will make that money back in 40 minutes. Also, after the first hour spent there with a cannon, you make 1 million gp+ per hour (only take bones) The more cannonballs you buy the better. My inv consists of 260 cannonballs 2 shark and I use glory amulet to tele to edgeville. I then sell the glory for 1k less after I use the charges. For level 80, I'd recommend about 8 monkfish though. And stay with the 260 cannonballs :)
there are 4 cannonballs
CannonBalls R us
do u require a username if so :fifa499 if u require aaccount from somebody that is illegal and frowned upon in the runescape community
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Cannonballs did not exist in medieval times. They belong to a later era.
Cannonballs
Some are
Nothing, because it does not require any downloads.