At Level 85 Ranging Spiritual Bolts act as Runite Bolts with a 1/20 or.5percent chance like acting like they were Dragonstone Tipped Bolts (e) or Onyx Tipped Bolts (e). Spiritual Bolts if they behave like RS gold they have been Dragonstone Tipped possess a damage cap of 25. If they behave like Onyx tipped Bolts, they can still"leech" your competitions hitpoints. Do remember Free Players would be limited to ONLY Bronze Bolts with no effect.
Fiara has made a decision to allow several minigames to have the same ability by talking to the NPC's in charge of those. Castle Wars. By speaking to cheap RuneScape gold Lanthus at Castle Wars you can select if you want to be granted Arrows, Bolts, or Runes when you enter.