This effect can be triggered with auto attacks and abilities, with abilities consuming one bolt per activation. Multi-target abilities such as ricochet can trigger the effect separately on secondary targets.
Abilities that hit multiple times such as rapid fire have a chance to trigger it on each hit separately.
On 23 February2010, a glitch allowed players to 'duplicate' these bolts. The exploit involved a glitch that produced 12 dragon bolts(e) when the enchant spell was cast, but only one unenchanted dragon bolt was used up per cast. Each cast then made over 70k profit and some people performed the duplication over 1000 times per hour for 70m+ profit per hour. The exploit was linked in connection to the Recent Update on 22 February, and was patched in under 24hrs time only existing for one day (Feb 23rd). The bug was so widely abused that the price of dragon bolts(e) had fallen from 7000 to about 4900 coins after the glitch. The glitch could also be performed on other bolts, but apparently dragon bolts(e) were the most commonly duplicated. Many threads have been hidden on the Fletching marketplace Forum on the RSOF indicating players that have abused this bug. Many abusers were banned, and Jagex released an official statement about the glitch on 2 March2010.
These bolts were untradeable when released, but a hidden update in 2007 made them tradeable.