Mega mighty comp bows

[Macbrea]

Lets look at the progression of the composite bow.

Medium sized
Shortbow (mighty +1) (Damage 1d6)
Shortbow (mighty +2)

Large sized
Longbow (mighty +1) (Damage: 1d8)
Longbow (mighty +2)
Longbow (mighty +3)
Longbow (mighty +4)

Assuming huge is double the strength of a Large
Longbow (mighty +1) (Damage: 2d6)
Longbow (mighty +2)
ect....
Longbow (mighty +7)
Longbow (mighty +8)

Assuming Gargantuan is double the stength of a Huge
Longbow (mighty +1) (Damage: 2d8)
Longbow (mighty +2)
ect ....
Longbow (mighty +15)
Longbow (mighty +16)

Assuming Colossal is double the strength alotment of a Gargantuan
Longbow (mighty +1) (damage: 4d6)
Longbow (mighty +2)
ect ....
Longbow (mighty +31)
Longbow (mighty +32)


The Huge storm giant could wield a Gargantuan Composite Longbow. Since, it was one size larger then him. Therefor, following normal progression it would allow for upto a +16 mighty composite bow. You will notice that normal upsizing of the weapon appears to have the damage of the weapon correct. And I made the assumption from the fact that in every other case it increased by double the prior.

Technically, a shortbow for him would max at +8 strength.

 

[Macbrea]

By the way, for scaling down it should look like this:

Small
Small Composite shortbow (mighty +1) (damage: 1d4)

Medium
Small composite Longbow (mighty +1) (damage: 1d6)
Small composite Longbow (mighty +2)



And
Small
Tiny Composite longbow (mighty +1) (damage: 1d4)


So, the issue comes into wether your Medium size orc can wield a Huge Composite longbow (mighty +8). Personally, I would rule as the book is written that the weapon is just plain too large for you to use.

A player might be able to argue for : a feat that allowed you to wield a ranged weapon of one size category larger then you could normally handle. Though we have discovered normal sizing up of weapons does result in very odd number effects.

Example:

Light crossbow is a small weapon. By the rules a medium sized creature can wield upto a large weapon.

So, if a Light crossbow is upsized to that of a Large Light crossbow its stats would look like this:

Large Crossbow, light (damage 2d8, 19-20/x2, 80ft, MEA to reload)

Why the heck would you ever take a heavy crossbow or a great crossbow if you could simply upsize a light crossbow.