Eidolon overcoming DR / cold iron?

[cfalcon]

There's a feat in the APG to add Magic + Silver to natural attacks.
There's an evolution that just grants magic, but at 10th level it also grants your alignment.

I believe the only way to overcome Cold Iron as an Eidolon using natural attacks is the Amulet of Natural Attacks enchanted to +3 or higher? At +3 I think it overcomes all metal based DRs.

Also, where is the rule stating that? Someone told me that on the boards but I never saw it in the book.

[Pirate]

Yar.

The rules for overcoming damage reduction are on page 562 of the PF Core Rulebook.

It is also HERE on this website.

~P