Why shouldn't you be able to?
If you do a collision read test with the bullet, you will either have a tank in the collision array or you won't.
If you have it: Remove the bullet and call the needed method on the tank
If you don't have it but a different collision (lets assume an obstacle thats undestroyable): remove the bullet.
You can't do a collision check for all objects at the same time.
Thats why I would not write bullets to the collision layer btw: If you don't write them to it, other bullets can't collide which means that only tanks (and obstacles if you put them in the tested collide layers) can generate an entry in the collision response array.
If you do a collision read test with the bullet, you will either have a tank in the collision array or you won't.
If you have it: Remove the bullet and call the needed method on the tank
If you don't have it but a different collision (lets assume an obstacle thats undestroyable): remove the bullet.
You can't do a collision check for all objects at the same time.
Thats why I would not write bullets to the collision layer btw: If you don't write them to it, other bullets can't collide which means that only tanks (and obstacles if you put them in the tested collide layers) can generate an entry in the collision response array.