As you get kills and progress Special Ammo meter, Special Ammo needs to directly go to you and not drop on the ground where the enemy died. It stays on the ground for 30 seconds then disappears. If your trade with the person and spawn on other side, that ammo brick is gone. If you need to Regen health after kill or there are enemies near/headed towards brick, that ammos gone. 2 of my matches today had no special ammo kills other team. If Im going to use special ammo in this double primary -blam!- show, send that special to directly to me and not on the ground.