Never had to use all of what's in the gun hunting deer. If you have to blast away to put Bambi down, then maybe you need more range time and to learn to be more discriminating with your shot selection.
That being said, I carry the partial box with me. It goes in the lower right coat pocket because it's easier that way for me to keep track of it. I don't need that much ammo- but it's better to have and not need than need and not have.