If I'm not mistaken, I think he means what happens if you combine, say, a +3 Bow and a +2 Arrow? Will the arrow be able to hit a creature requiring +5 weapons? +3? Or +2 only due to the arrow itself?
I myself am very curious, as what would be the point of a +5 bow with normal arrows, you still would only be able to hit "normal" creatures.
If the "required-to-hit" bonus is based on the projectile, than only weapons that require no ammunition and which fire their own projectiles would be worth keeping or using. Say a +3 Bow which fires "phantom" arrows or some such nonsense...
