Can someone explain to me why this raycast doesn't fire straight?

 using UnityEngine;
 using System.Collections;
 
 public class Firegun : MonoBehaviour {
     public float shots=1.0f;
     public float spread=5.0f;
     // Use this for initialization
     void Start () {
         
     }
     
     // Update is called once per frame
     void Update () {
         RaycastHit target;
         Vector3 targetDir = new Vector3 (transform.Find ("Main Camera").transform.rotation.x * -1,transform.rotation.y *-1,transform.rotation.z);
         //print ("Vector3: ("+targetDir.x+","+targetDir.y+","+targetDir.z+"), Direct: ("+transform.Find("Main Camera").transform.rotation.x+","+transform.rotation.y+","+transform.rotation.z+")");
         if (Input.GetMouseButtonDown (0)){
             print ("Clicked!");
             for (float i=0;i<=shots;i++){
                 if (Physics.Raycast (transform.position,targetDir,out target,1000.0f,1)){
                     print (target.collider.gameObject.name+" was hit in the direction of ("+targetDir.x+","+targetDir.y+","+targetDir.z+") at a distance of "+target.distance+"!");
                     Debug.DrawRay (transform.position,targetDir,Color.green,5,true);
                     Debug.DrawLine (transform.position,target.point,Color.red,15,true);
                 }
             }
         }
     }
 }
 

I don't really understand why this doesn't work. The X axis is where the camera pivots and the Y axis is where the player pivots. It's supposed to fire straight (I'm going to add spread once it does). It seems to fire off to the side or to the ground depending on where I'm looking but never straight.