If you cast Flame Arrow on some bolts and fired them from a Flaming crossbow, would they do +2d6 fire damage?
Flaming weapon
Aura Moderate evocation; CL 10th; Craft Magic Arms and Armor and flame blade, flame strike, or fireball; Price +1 bonus.DescriptionUpon command, a flaming weapon is sheathed in fire that deals an extra 1d6 points of fire damage on a successful hit. The fire does not harm the wielder. The effect remains until another command is given.
Bows, crossbows, and slings crafted with this ability bestow this power upon their ammunition.
Flame Arrow
This spell allows you to turn ammunition (such as arrows, crossbow bolts, shuriken, and sling stones) into fiery projectiles. Each piece of ammunition deals an extra 1d6 points of fire damage to any target it hits. A flaming projectile can easily ignite a flammable object or structure, but it won't ignite a creature it strikes.
Yes. The bonus comes from different sources, so they do, in fact, stack. Notice that the spell does not specifically say "as a weapon with the flaming enhancement." This is why they actually stack. Many other instances of spells and abilities that do similar things specify that it is as the enhancement, which nullifies stacking. This does not, thus they do stack.
Edit: For comparison's sake
Flames of the Faithful
School transmutation [fire]; Level inquisitor 2
Casting Time 1 standard action
Components V
Range touch
Target weapon touched
Duration 1 round/level
Saving Throw Fortitude negates (object, harmless); Spell Resistance yes (object, harmless)
With a touch, you cause a glowing rune to appear on a single weapon, granting that weapon the flaming property (and allowing it to cause an extra 1d6 points of fire damage on a successful hit). If you are using the judgment class feature, your weapon gains the flaming burst property instead. The spell functions only for weapons that you wield. If the weapon leaves your hand for any reason, the spell effect ends. The effects of this spell do not stack with any existing flaming or flaming burst weapon property that the target weapon may already possess.
If you cast Flame Arrow on some bolts and fired them from a Flaming crossbow, would they do +2d6 fire damage?
Flaming weapon
Aura Moderate evocation; CL 10th; Craft Magic Arms and Armor and flame blade, flame strike, or fireball; Price +1 bonus.DescriptionUpon command, a flaming weapon is sheathed in fire that deals an extra 1d6 points of fire damage on a successful hit. The fire does not harm the wielder. The effect remains until another command is given.
Bows, crossbows, and slings crafted with this ability bestow this power upon their ammunition.
Flame Arrow
This spell allows you to turn ammunition (such as arrows, crossbow bolts, shuriken, and sling stones) into fiery projectiles. Each piece of ammunition deals an extra 1d6 points of fire damage to any target it hits. A flaming projectile can easily ignite a flammable object or structure, but it won't ignite a creature it strikes.
I would have to say no. Yes they are from two different sources, but they are the same enhancement type. They are both adding a fire enhancement.
But if you put a fire arrow though say, a shocking bow, then that damage would stack because it is two different types of enhancements.
That is the way I've always played, your GM might be different.
Yea, the usual ruling is that it makes perfect sense to have a weapon that both freezes and burns the target, rather than allow a weapon that is twice as hot.
I suppose from a resistance view there is a point about some balance somewhere.
Flaming, shocking, acid, ice attack works.
Flaming with flaming does not. :-)