Longbow size damage

[Rahnum]

How does the size of the longbow affect the damage. The size table only went up to Large.

My character is able to wield a Huge Longbow (giant) and he's a ranger so when i use gravity bow things are going to get even crazier. So what the heck are the damages for this thing?

[Ipslore the Red]

Enlarge Person has the table for this sort of thing. Find the original damage dice on it, then go up as many steps as needed.

Original Revised
1d2 1d3
1d3 1d4
1d4 1d6
1d6 1d8
1d8 2d6
1d10 2d8
1d12 3d6
2d4 2d6
2d6 3d6
2d8 3d8
2d10 4d8

[Rahnum]

Oh thank you very much for your speedy and informed response. Looking at it now I see what you did.

[Rahnum]

So continuing off of that
2d10 4d8
2d12 4d6
3d4 3d6
3d6 4d8 ?

I'm not sure how it goes if I use gravity bow which would make the longbow another category bigger in terms of damage.

1d8-large->2d6-huge->3d6-gravity bow spell=gargantuan->?
3d6 goes to?

[Quantum Steve]

1d2->1d3->1d4->1d6->1d8->2d6->3d6->4d6->6d6->8d6

From there every two size increases doubles the number of dice.

d10 weapons like the Bastard Sword work different.

1d10->2d8->3d8->4d8->6d8

Again, doubling the number of dice every two size increases.

[Rahnum]

Thanks! what's the source you've got for that?

[Mudfoot]

There's no direct example. 3d6 (average 10.5) is very nearly 2d10 (avg 11) so 4d8 (18) is perhaps reasonable, if more generous than anything in the table.

If we compare average damage:
Original Revised Ratio
1d2 = 1.5 1d3 = 2 1.33
1d3 = 2 1d4 = 2.5 1.25
1d4 = 2.5 1d6 = 3.5 1.4
1d6 = 3.5 1d8 = 4.5 1.29
1d8 = 4.5 2d6 = 7 1.56
1d10 = 5.5 2d8 = 9 1.64
1d12 = 6.5 3d6 = 10.5 1.62
2d4 = 5 2d6 = 7 1.4
2d6 = 7 3d6 = 10.5 1.5
2d8 = 9 3d8 = 13.5 1.5
2d10 = 11 4d8 = 18 1.64

which averages 1.47

So 3d6 = 10.5 should become about 15.3, which is not a clean number of dice (except 6d4 which is nightmare to roll). I'd do 2d8+1d10 (15.5) or 3d6+1d8 (15), but YGMMMV. Sticking to one form of dice gives 4d6=14 or 3d10=16.5.

[Mudfoot]

Quantum Steve wrote:

Again, doubling the number of dice every two size increases.

Which amounts to a ratio of sqrt(2)=1.4142, which isn't far off the above table. So though I can't find any evidence for this, it's an entirely reasonable approach. OTOH, it's not as even as it might be; the ratio flips between 1.33 and 1.5 so you could smooth it out a bit.

[Rahnum]

Wow gonna admit that got above my head there. No wait I sorta see what you did there. I appreciate all this help.

[Quantum Steve]

Rahnum wrote:

Thanks! what's the source you've got for that?

It a compilation from the table in the Equipment Section and the Improved Natural Attack feat. Both seem to use identical progressions.

The bit about doubling every two sizes is just an observation, but it is reinforced by the Strong Jaw spell

[Rahnum]

I see what you mean. Clever!