sizing the blunderbus... what happens to damage and range?

[Phaederkiel]

Lets say my wizard in Iron kingdoms wields a Blunderbus for style reasons.

I want to put the sizing enchantment on it, increasing it to the maximum size I can still pull the trigger with my meager strength. (8)

the blunderbus does seemingly 4d4 with a x4 crit modifier. in a 15 ft cone.

what would happen to the damage? does it (by increasing it to gargantuan)
4 x 3d6 = 12d6 damage?

what would happen to the cone? are there any rules for such things?
I really hope it will grow bigger. but by how much?

[Flickerdart]

Looking at the scaling tables, there's a trend that's true for most weapons - size increases increase the die size to d6, and then you add d6es (except for the Gargantuan -> Colossal step which is +2d6). So the scaling would go 4d4, 4d6, 5d6, 6d6.

The cone wouldn't grow bigger, because weapon size and weapon range have no relation, by the rules. This sort of makes sense for guns - you're adding more powder, but also more shot, so the total force acting on any given piece of shot remains more or less the same, there's just more of them (so more damage).

[Phaederkiel]

hmm, the best comparision seems to be weapons that deal 2d4:
2d4 2d6 3d6 4d6 6d6.

the blunderbus starts with 4d4, and dealing less than an item that starts with less basis damage is somehow not very cool.

[Flickerdart]

You're not dealing less - at Gargantuan, you're 6d6 to their 4d6, still two dice ahead just as you started out.

[Phaederkiel]

so, for collosal (which is what i would go for...) would you give 8d6?

[Flickerdart]

Yes - Colossal is typically an increase of two dice.