How do I make my crosshair more accurate?

Ohhh that explains why when I shoot and the recoil happens, ins$$anonymous$$d of going up the crosshair goes down. Thanks alot! Btw I tried using your code to convert it but it's now entirely off the screen. I put this before my code : CrossHairPosition.y = Screen.height - CrossHairPosition.y; CrossHairPosition.x = Screen.height - CrossHairPosition.x;

I managed to work it out with GUIUtility.ScreenToGUIPoint but the crosshair is still, for some reason, going down when I shoot and recoil while the gun is going up.

Here is your code merged with a bit of $$anonymous$$e since you did not provide all your script. Start with an empty scene. $$anonymous$$ake a cube and set its size to something like (.2, 0.2, 1.0). $$anonymous$$ake an empty game object to use as a spawn point and place it just in front (positive z) of the cube. Then make the spawn point a child of the cube. Attach this script to the spawn point.

Run it. When you click, it will put a sphere at the position used in the calculation. In the inspector, you can move the cube, rotate the cube, and change the Power.

What you will find this this code works as long as the ray does not hit something. The problem is that when it hits something, the calculation...

 CrossHairPosition = Camera.main.WorldToScreenPoint(myRay.GetPoint(Power));

...is not accurate because the hit position calculate in CastRay() is not the same as the ray calculate for the OnGUI code to place the crosshair. The crosshair calculation always assumes the ray misses.

To fix the problem, you will have to use the same calculation, either by having them in the same file and saving the position in an instance variable (top of the file), or by using by casting the ray a second time in the code that places the crosshair. And even this is not a complete fix since there will be times when the crosshair will appear to jump, and times it will appear that the crosshair should hit something when, due to perspective, the gun is not really aligned with the object.

 public class GunScript : $$anonymous$$onoBehaviour {
     
     public Texture CrossHair;
     public float Power = 10;
     private Vector3 scale = new Vector3(0.5f, 0.5f, 0.5f);
 
     public void CastRay()
     {
        RaycastHit Hit;
           GameObject go = GameObject.CreatePrimitive(PrimitiveType.Sphere);
          go.transform.localScale = scale;
         
        if(Physics.Raycast(transform.position,transform.forward,out Hit,Power))
        {
         go.transform.position = Hit.point;
          if(Hit.transform.gameObject.tag == "target")
          {
                Destroy(Hit.transform.gameObject);
          }
        }
         else
             go.transform.position = transform.position + transform.forward * Power;
     }
     
     // Update is called once per frame
     void Update () {
         
         if (Input.Get$$anonymous$$ouseButtonDown (0))
         {
             CastRay ();
             Ray myRay = new Ray(transform.position,transform.forward);
             Vector3 CrossHairPosition = Camera.main.WorldToScreenPoint(myRay.GetPoint(Power));
  
             GUI.Label(new Rect(CrossHairPosition.x - (CrossHair.width / 2),CrossHairPosition.y - (CrossHair.height / 2),CrossHair.width,CrossHair.height),CrossHair); //Crosshair is 2D texture
         }
     }
     
     void OnGUI()
     {
         Ray myRay = new Ray(transform.position,transform.forward);
         Vector3 CrossHairPosition = Camera.main.WorldToScreenPoint(myRay.GetPoint(Power));
         CrossHairPosition.y = Screen.height - CrossHairPosition.y;
  
         GUI.Label(new Rect(CrossHairPosition.x - (CrossHair.width / 2),CrossHairPosition.y - (CrossHair.height / 2),CrossHair.width,CrossHair.height),CrossHair); //Crosshair is 2D texture
     }
 }

Thanks alot! I'm going to see what I can do to see if it'll fix.