elemental bow iron grip dmg increas

Does Iron grip Increase the damage of the elemental portion of your porjectiles?

If I have 200 cold/lightning/fire on gear
And i'm using split arrow
Does it increase the physical dmg of the porjectiles as well as the elemental ?

If I use Lightning arrow
does it increase the damage of the lightning conversion and does it increase the damage of the mutliple targets hit?

Thanks for answering
This has been bugging me

It will only increase the basic damage done by Lightning Arrow, meaning it would increase both the 50% physical and 50% lightning, because the 50% lightning is converted from physical! That increase also applies to the chain mechanic of LA, simply put.

Other than that, all your questions are answered with "No". Same as above applies to split arrow as well; except that there is no damage conversion to any element.

Iron grip only affects the projectile attack, meaning your physical damage so anything that converts that to elemental will work, like Ice Shot, and Lightning arrow.

Thanks for taking the time to answer.
Makes a lot more sense now.