Damage Reduction + Vulnerability

[awesomenessofme1]

This doesn't seem to be specifically addressed in the rules. Are there any snags, or is it just the obvious "apply DR, apply wounding modifiers, then multiply for Vulnerability and divide for Damage Reduction"?

[WingedKagouti]

Originally Posted by awesomenessofme1

This doesn't seem to be specifically addressed in the rules. Are there any snags, or is it just the obvious "apply DR, apply wounding modifiers, then multiply for Vulnerability and divide for Damage Reduction"?

Vulnerability is a special Wounding Modifier that is multiplicative with the regular modifiers (B161). IT:DR is applied after all Wounding Modifiers (P53).

[awesomenessofme1]

Originally Posted by WingedKagouti

Vulnerability is a special Wounding Modifier that is multiplicative with the regular modifiers (B161). IT:DR is applied after all Wounding Modifiers (P53).

But since DR is applied before all of them, it should still be functionally the same, right? Except for possibly some rounding errors?

[WingedKagouti]

Originally Posted by awesomenessofme1

But since DR is applied before all of them, it should still be functionally the same, right? Except for possibly some rounding errors?

Correct, they're all (usually) multipliers so given the mathematical order of operations doing it one way or another is usually irelevant. The one corner case would be if you somehow have an additive (or exponential) wounding modifier, but I can't think of any of the top of my head.

[Black Leviathan]

You can apply a limitation to DR so that it also is reduced against your bane attack.

[Varyon]

Originally Posted by GURPS Characters, p 161

You take extra damage from a particular attack form. Whenever this type of attack hits you, the GM applies a special wounding multiplier to damage that penetrates your DR. Regular wounding multipliers (for cutting, impaling, etc.) further multiply the damage.

(emphasis added)

This is from the description of Vulnerability, and I think answers the question pretty definitively. As already noted, you can take a Limitation on your DR to not apply against your Vulnerability if that's appropriate for your character concept (the Limitation is Bane, from GURPS Horror).