How do size increases (Firearm Ace) interact with Fatal?

[Adam B. 135]

I tried searching the forums and could not find an answer. I ask this because I can imagine Firearm Ace and Fatal interacting very often based on Gunslinger's high firearm proficiency bonus.

[Tweezer]

Pretty sure they don't interact. Ie. The die increase happens before fatal, so the fatal dX stays at the same place,but I could be wrong.

[Alchemic_Genius]

By RAW, dice size increases don't stack, only the higher level one applies, and Firearm Ace increases the weapon's die size, not the die of its fatal trait.

[Michael Sayre]

Alchemic_Genius wrote:

By RAW, dice size increases don't stack, only the higher level one applies, and Firearm Ace increases the weapon's die size, not the die of its fatal trait.

I see I'm not needed here....

[Alchemic_Genius]

Senpai noticed me!

[Ascalaphus]

Michael Sayre wrote:

Alchemic_Genius wrote:

By RAW, dice size increases don't stack, only the higher level one applies, and Firearm Ace increases the weapon's die size, not the die of its fatal trait.

I see I'm not needed here....

Well, if you're here anyway...

I'd say this is enough of a pitfall that explaining it explicitly in a sidebar isn't a bad idea. And while doing that, it might also be nice to clear up how weapon die size increases work on Two-Hand weapons.