Help I use rigidbody.addforce to fire projectiles an it randomly doesn't go to the crosshair!

public GameObject shurikenProjectile; public List projectileSpawnTransforms = new List(); public int damage = 10; public float speed = 10f; public float range = 100f;

     public bool canShoot;
     public int maxAmmo = 30;
     public int currentAmmo;
     public float reloadTime = 1f;
     public bool isReloading = false;
     public bool canReload = true;

     public Text curAmmoNumber;
 
     public Camera fpsCam;

     public Animator abilitiesAnimator;

     public GameObject leftShurikenPoint;
     public GameObject rightShurikenPoint;
     public float betweenShots;
 
     public float timeRemaining;
     public float timerMax = 1f;
     public float currentAmmoSlider;
     public Slider reloadSlider;
     public GenjiDash dashScript;
     public Text dashControl;

     public AlphaChange dashText;

     public float ultDuration;

     void Start()
     {
         curAmmoNumber.text = "30";

         currentAmmo = maxAmmo;

         canShoot = true;

         timeRemaining = timerMax;
     }

     void Update()
     {
         if(isReloading == false)
         {
             timeRemaining = currentAmmoSlider;
         }

         reloadSlider.value = CalculateSliderValue();
     
         if(isReloading)
         {
             timeRemaining += Time.deltaTime;
         }

         if(isReloading)
         {
             return;
         }

         if(currentAmmo <= 0)
         {
             if(canReload)
             {
                 timeRemaining = 0;
                 StartCoroutine(Reload());
                 canShoot = false;
             }
         }

         if(Input.GetButtonDown("Reload"))
         {
             if(currentAmmo < 30)
             {
                 if(canReload)
                 {
                     timeRemaining = 0;
                     StartCoroutine(Reload());
                     canShoot = false;
                 }
             }
         }

         if(canShoot)
         {
             if(Input.GetButtonDown("Fire1"))
             {
                 canShoot = false;
                 StartCoroutine(Shoot1());
             }
         }

         if(canShoot)
         {
             if(Input.GetButtonDown("Fire2"))
             {
                 canShoot = false;
                 StartCoroutine(Shoot2());
             }
         }

         curAmmoNumber.text = currentAmmo.ToString();
     }

     public IEnumerator Reload()
     {
         StartCoroutine(dashText.ChangeAlpha());
         StartCoroutine(dashScript.shurikensReloading());

         isReloading = true;
         Debug.Log("Reloading");

         abilitiesAnimator.SetBool("Reloading", true);

         yield return new WaitForSeconds(reloadTime - .25f);

         abilitiesAnimator.SetBool("Reloading", false);

         yield return new WaitForSeconds(.25f);

         isReloading = false;
         currentAmmoSlider = 1f;
         currentAmmo = maxAmmo;

         canShoot = true;
     }

     public IEnumerator Shoot1()
 {
     canReload = false;

     int shurikensFired = 0;

     while (shurikensFired < 3)
     {
         shurikensFired++;
         GameObject projectileInstance = Instantiate(shurikenProjectile, transform.position, projectileSpawnTransforms[1].rotation);
         projectileInstance.GetComponent<Rigidbody>().AddForce(projectileInstance.transform.forward * speed, ForceMode.VelocityChange);

         currentAmmo--;
         currentAmmoSlider -= 0.0333f;

         Debug.Log("Wait1");
         yield return new WaitForSeconds(betweenShots);
     }
     yield return null;

     canShoot = true;
     canReload = true;
 }

 public IEnumerator Shoot2()
 {
     canReload = false;

     GameObject projectileInstance1 = Instantiate(shurikenProjectile, transform.position, projectileSpawnTransforms[0].rotation);
     projectileInstance1.GetComponent<Rigidbody>().AddForce(projectileInstance1.transform.forward * speed, ForceMode.VelocityChange);

     currentAmmo--;
     currentAmmoSlider -= 0.0333f;

     Debug.Log("Wait2");
     yield return new WaitForSeconds(betweenShots);

     GameObject projectileInstance2 = Instantiate(shurikenProjectile, transform.position, projectileSpawnTransforms[1].rotation);
     projectileInstance2.GetComponent<Rigidbody>().AddForce(projectileInstance2.transform.forward * speed, ForceMode.VelocityChange);

     currentAmmo--;
     currentAmmoSlider -= 0.0333f;

     Debug.Log("Wait2");
     yield return new WaitForSeconds(betweenShots);

     GameObject projectileInstance3 = Instantiate(shurikenProjectile, transform.position, projectileSpawnTransforms[2].rotation);
     projectileInstance3.GetComponent<Rigidbody>().AddForce(projectileInstance3.transform.forward * speed, ForceMode.VelocityChange);
     currentAmmo--;
     currentAmmoSlider -= 0.0333f;

     canShoot = true;
     canReload = true;
 }

 float CalculateSliderValue()
 {
     return(timeRemaining / timerMax);
 }

 public IEnumerator shurikenStop()
 {
     canShoot = false;
     canReload = false;
         
     yield return new WaitForSeconds(ultDuration + 2f);
     canReload = true;
     canShoot = true;
 }

}