Bullet not destroying on contact

using UnityEngine; using System.Collections;

public class Bullet : MonoBehaviour {

 public int moveSpeed = 220;
 public Transform explosionPrefab;

 // Update is called once per frame
 void Update()
 {
     transform.Translate(Vector3.right * Time.deltaTime * moveSpeed);
     Destroy(gameObject, 1);
 }

 void OnCollisionEnter(Collision collision)
 {
     ContactPoint contact = collision.contacts[0];
     Quaternion rot = Quaternion.FromToRotation(Vector3.up, contact.normal);
     Vector3 pos = contact.point;
     Instantiate(explosionPrefab, pos, rot);
     Destroy(gameObject);
 }

}

Been at it for a couple days. Really can't figure this one out for some reason.