» Thu Jun 07, 2012 6:44 pm
My experience is that followers will use any bow, but not any arrow with it. There seems to be a damage level point of the arrow which causes them to revert to their default hunting bow. I've never tested Orcish (arrow damage 12, bow damage 10), since I rarely use it, but they definitely will not use Dwarven arrows (damage 14) with a Dwarven bow (damage 12). They'll use steel or ancient Nord arrows with it, though (damage 10). And they'll use any arrow with a lower base damage bow, with the "lower base damage" point being 8, or maybe 10. One way around this is to improve a lower damage bow. I got Lydia to use a legendary Forsworn bow (base 8*) with glass arrows. Giving followers archery boosting gear also helps.
I have Lydia equipped with an Orcish bow right now, which she is using with steel arrows. As soon as I can get Orcish arrows, I'll give her some and see what happens. If she reverts to her hunting bow, then I'll know that's the point where this happens.
* The UESP wiki has 12 for the base damage of the Forsworn bow, but the Prima guide has 8. I think the Prima is correct, but I'll have to test it. The Forsworn arrow is only 7.