Adamantium weapon vs. adamantium armor - DR applies?

[Damon Griffin]

When heavy adamantium armor (which provides DR 3/- just due to the special material) is struck with an adamantium weapon, does the DR still apply?

Mechanically it seems like it should because it's DR 3/-, not 3/adamantium. But logically I don't know why any material should provide special protection against itself. And not that it should make a difference, but armor and weapon are both +5.

[Rasief]

Well, iron armor definitely provides protection against iron weapons, not in the form of DR but provides protection.

As for the DR entry the "-" means that there is no way for a weapon to overpass the DR, no matters his material or his magical bonus, so the adamantium armor still keeps the DR 3 against an adamantium weapon.

[Mauril]

Rasief's got it right. He even used exactly the example I wanted to use.

Basically, adamantine weapons ignore hardness less than 20. Adamantine itself has hardness 20, so it doesn't ignore its own hardness. If you need a logical reason why adamantine weapons don't by-pass the adamantine armor's DR, that would be it.

[Chemlak]

A +4 weapon could overcome DR 3/Adamantium.

[GeneticDrift]

Adamantine armor is not bypassed by adamantine weapons.

the DR is not /adamantine it is DR/- so no weapon ignores it. (normal things unaffected by DR still ignore it like fire).

[Damon Griffin]

Rasief wrote:

Well, iron armor definitely provides protection against iron weapons, not in the form of DR but provides protection.

And this is why I mentioned special protection; protection beyond what the armor bonus for the armor type would indicate, based on the material used.