What do i use.....Follow

Ammo Pouch for bullets, Quiver for arrows. They go into a normal bag slot, and can hold nothing but their respective ammunition.

As has already been said you use special bags for ammo which depending on level give various buffs to ammo speed , but you can use normal bags if you do not mind the loss of the 10% to 15% extra haste that the ammo pouch or quiver gives you and that is a big loss to your dps if you use normal bags.

One tip is always get the biggest Quiver or Pouch you can afford as you will find at higher levels you will always be running out of ammo . i know that from my own exp , so far better to have a large bag for your ammo than running out of ammo and having to find a seller.