In extinction, just unlocked Armor Piercing ammo. Is that better than the Explosive? Debating which to use. I see that explosive has splash damage, but I assume Armor Piercing would really do more damage if you aim better.
Explosive ammo is the best all purpose ammo to use. Armor Piercing doesn't kill Rhinos all too much faster, and at a point, you want to use your terrain to make Rhinos jump up and jump down edges since they are slow at doing so to make time for kill. Otherwise, an ability can help take it down fast and you get most of your cash back and bonus exp when it dies.