Yeah, I'd make Motes (bullets) that have properties, however, you will need an override to get them to have powerful bonus feats, etc.. (bullets don't normally allow you to use the good stuff)
B_Harrison made a good override for 1.69, but it's not really compatible with CEP unless you take out the CEP one in the hak and edit it yourself, (I did this, let me know if you want a copy of my hak)
It also had higher stacking on potions / scrolls / arrows /etc.. 100 - 999