|189,000 per hour|
27,000 x Diamond bolts (9,882,000)
Diamond bolts are used to create Diamond bolts (e), some of the most powerful ammunition in the game. It can be very profitable to fletch diamond bolts with diamond bolt tips and adamant bolts. However, there could be a fairly small profit margin, and the prices of the involved items can vary greatly. It is important to test the profit of this method beforehand, by buying the materials, making a bolt, and seeing how much it sells for.
Once you have your materials, use the bolt tips on the bolts. A menu will open up to make diamond bolts; click to make 10. Each set of ten bolts takes 1.2 seconds, so 100 bolts takes 12 seconds. After every set of 100, use the tips on the bolts again and repeat. You can make up to 27,000 bolts an hour with this method, while also gaining impressive Fletching experience.
Once you have made all of your bolts, sell them on the Grand Exchange. Maximise your profit by buying one diamond bolt and selling yours patiently, just slightly below that price.
Note that because this method only uses three inventory spaces, it can be used in conjunction with other money making methods where inventory space is not essential, such as collecting tasks where it takes time to respawn.
It is strongly recommended to check the live prices on the Grand Exchange before making large investments in any method.
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