Bullet collision + hp

[system]

This is my script, that just want to subtract hp. Both the bullet object and the monster have colliders.

var hp = 5;
function OnCollisionEnter(hit : Collision)
{
// Bullets
if(hit.gameObject.tag == "Bullet")
{
hp--;
}
}

function Update()
{
if(hp < 1)
{
Destroy(gameObject);
}
}

What is wrong with it?

Edit: Bullet have this script:

function OnCollisionEnter(collision : Collision)
{
Destroy(destroybullet);
}

[_Petroz]

The code looks OK, try putting a print statement in OnCollisionEnter to make sure it is getting called.

[tool55]

You may be getting tunneling. If the bullet is small and moving fast, it can pass through the collider in less than a frame in which case it won't be detected. Try slowing down the bullet. Also, I would assume your bullet has a rigidbody. Perhaps you can post the bullet instantiation script. The problem lie there and not in the collision script.