[2d] When I shoot bullets they have different speeds

Hello, I have a 2d platforming shooter where the player can shoot where the mouse aims. Everything works, the aiming and shooting are all functional, but for some reason even if I shoot in the same spot some bullets will have different speeds than others. I have had this problem working on another project but I kind of just shrugged it off because I was not putting much effort into it, but I want this project to feel right.

Here is some sample code:

void Update()
    //Changing Rotation of Gun
    direction = Camera.main.ScreenToWorldPoint(Input.mousePosition) - this.transform.position;
    angle = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg - 90f;
    this.transform.eulerAngles= new Vector3(0, 0, angle);

    //Shooting the Gun
    if(Input.GetMouseButtonDown(0) || Input.GetKeyDown("z"))

void Shoot()
    GameObject spawnedBullet = Instantiate(bullet, spawnPoint.transform.position, GetComponent<Transform>().rotation);
    spawnedBullet.GetComponent<Rigidbody2D>().AddForce(direction.normalized * Time.deltaTime * bulletSpeed,ForceMode2D.Impulse);

Thanks in advance!

I think you shouldn’t multiply by Time.deltaTime.