This segment of code is causing problems

Questions & Answers
1 
if(Input.GetButtonDown("Fire1") && !reloading && shot == "spread")
        {
            var i : int = 3;

            while(i > 0)
            {
                clone = Instantiate(bullet, transform.position, transform.rotation);
                i--;
            }
            ammo--;
        }

If I remove the while loop the bullets shoot straight like normal. But I want to do a spread shot and this method is causing the bullets to spiral off the screen. Any ideas on how to do a spread shot would be appreciated.

2

Your script are creating 3 bullets instances at same time, position and rotation.

If your bullets have colliders this can be a problem because they will collide thenselves
Try to remove colliders if they have.

Looking at your script, I assume that the acceleration of the bullets is not in this script. Maybe it's in a script attached in the bullets, like Johan posted.

3

Ok the code segment that controls the acceleration is in another script that is attached to a bullet prefab.

var speed = 10.0; //Can be adjusted if needed

function Start() //Affects bullet accuracy
{
    var acc : int = Random.Range(0, 6);
    transform.Rotate(0, acc, 0);    
}

function Update () 
{
    var translation = speed;
    translation *= Time.deltaTime;
    transform.Translate(0, 0, translation);
}

function OnCollisionEnter(hit : Collision)
{
    if(hit.collider.gameObject.CompareTag("Wall") || hit.collider.gameObject.CompareTag("Enemy") )
        Destroy(gameObject);
}