It depends on whether you are interested in rules or technical capability.
From a rule perspective usually societies have classes that allow high tech materials, although the specifically trad classes tend not to, you can often move up a class.
From a technical perspective, if it has glass you probably wont have much trouble, self bows especially tend to be very sensitive to the projectile weight although you can probably fudge it with something like a sand filled arrow.
As a general rule your arrows want to be too heavy, not too light, both because they tend to be more efficient and the bow, less likely to randomly deconstruct and because within reason heavier arrows tend to group better.
As a trade off, heavier arrows seem to give you more consistency points than speed gives you range error points, there is of course a sweet spot !