Here's a list of currently existing ubAmmoTypes. Note that it is possible to edit ammotypes.xml to add new types.

0 = Normal (ball)

1 = Hollow Point

2 = Armor Piercing

3 = Extra Armor Piercing

4 = Buckshot

5 = Unused...

6 = Unused...

7 = Monster Spit

8 = Knife Damage (ignores armor)

9 = High Explosive Minirockets

10 = High Explosive Armor Piercing Minirockets

11 = Tranquilizer

12 = Flame

13 = AET (Armor Piercing + Hollow Point)

14 = Glaser (Extra Hollow Point)

15 = Tracer

16 = Armor Piercing Tracer

17 = Match

18 = Armor Piercing Match

19 = Cold Ball

20 = Cold Hollow Point

21 = Cold Armor Piercing

22 = Cold Extra Armor Piercing

23 = Cold Glaser for small caliber ammo

24 = Cold Glaser for large caliber ammo

25 = Lockbusting shells

26 = Depleted Uranium