Ann Milch in the South Burb LifeNet facility wants you to return with the cheap ammunition you crafted. Once he has confirmed your work, she'll give you a horse that should make traveling the wastes a bit easier.

If you've got enough ammunition to get by for a while, you should be ready to take this horse off my hands.

Tell me more.

These pellets ought to do the trick. Now, just to show how much we appreciate the work you've done so far, here are the reins for a horse. You'll want to pick up feed and veterinary kits from one of the workers at the garage outside town, but the horse'll feed itself just fine as long as you leave it sitting off the road.

If you're having trouble getting on your horse, just go up and click on it. Making sure it's not actually someone else's horse would help too.