pcxbox360ps3 The Burnmaster, the Nuka-grenade, and the Zhu-Rong v418 Chinese pistol are unaffected by the perk. The guide lists these as being affected by this perk, but the weapons aren't on the form list - this is most likely an oversight by the developers. The unofficial Fallout 3 patch fixes this. [verified].
pcxbox360ps3 While this perk requires an Explosives skill of 60 to be unlocked, the only explosive items affected by the perk are the 40mm grenade, incendiary, the incendiary grenade and the Fire bomb. This was confirmed by J. E. Sawyer to be unintentional;[1] the perk was meant to be dependent on the Energy Weapons skill, which governs almost all fire-based weaponry.
pcxbox360ps3 This perk does not affect the flare gun or the cosmic knife super-heated, despite both weapons being capable of setting enemies on fire.
You have a natural affinity for fire and a knack for setting things ablaze - especially other people. You get +10% damage with fire-based weapons or spells.