In the BT TechManual PDF CAT 35002 2007-2013 The Topps Company, Inc. Corrected Third Printing Published by Catalyst Game Lab on pp. 345-346 there are additional ammo types. Looking at the BV tables I did not find BV for the other ammo types.
On the Inner Sphere Weapons and Equipment BV Table
The standard AC 2 ammo has a BV of 5. I really find it difficult to believe that Armor Piercing (AP) ammo has the same BV as a standard round since the AP ammo is specifically designed to punch through armor.
Can anyone please provide me with the book and page number if there is a BV for the other types of ammo?