1. shoot a deer with a cross bow (cause if you shoot a zombie, you're not getting a bolt back at all)
2. upon killing it, walk upto where you fired the last 20 bolts and missed and try to pick them up
3. No go charlie brown!
4. Empty crossbow
5. right click on bolt on the ground, and choose load ammo
6. Eject bolt from crossbow, if no room,, it will drop, but that's okay, cause you can combine it regardless now...it's unbugged.