bullets acting weird when spawn

[matthrewp]

When I spawn a bullet in-game, it sometimes moves to the left or right before going forward. Also, if I spawn one bullet going in one direction and another in a different direction, it seems to yank the other bullet in the direction it’s going for a short distance. Here is a link to a video of this happening:
https://drive.google.com/open?id=0B_HzgsC9lP3nS2RkUC1xRkU1Tmc
Here is my bullet spawning script:
using UnityEngine;
using System.Collections;

public class BulletController : MonoBehaviour {

    public GameObject BulletSpawn;
    public GameObject Bullet;
    GameObject BulletClone;
    public float BulletSpeed;
    void Update()
    {
        if (Input.GetKeyDown("space") == true)
        {
            BulletClone = (GameObject)Instantiate(Bullet, BulletSpawn.transform.position, BulletSpawn.transform.rotation);
        }
        Rigidbody rBody = GetComponent<Rigidbody>();
        rBody.velocity = BulletClone.transform.forward * BulletSpeed;
    }
}

Why are my bullets acting weird?

[FlightOfOne]

1. All physics stuff should be done in FixedUpdate(),

2. It is not good to directly change the velocity of a “Rigidbody”, you should be using forces to get desired velocity,

3. Try this instead:

   Instead of Update() use fixed.

   void FixedUpdate()
   {

                if (Input.GetKeyDown("space") == true)
                {
                    BulletClone = (GameObject)Instantiate(Bullet, BulletSpawn.transform.position, BulletSpawn.transform.rotation);
                    Rigidbody rBody = GetComponent<Rigidbody>();
                    rBody.AddRelativeForce(BulletClone.transform.forward * BulletSpeed,ForceMode.Impulse);
                    //rBody.AddRelativeForce(BulletClone.transform.forward * BulletSpeed, ForceMode.VelocityChange);  //<---Note ForceMode.VelocityChange, try this mode also, it ignores the mass
            }
    
    
        }
   

[mnmwert]

here is a script that should make the bullets fire right. but bring your spawn point out a little more.

using UnityEngine;
using System.Collections;

public class shotSpeed : MonoBehaviour {
    public float speed;
    public Vector3 target;
    public Transform target1;
    // Use this for initialization
    void Start ()
    {
        target = target1.transform.position;
    }
	
	// Update is called once per frame
	void Update ()
    {
        
        var delta = speed * Time.deltaTime;
        transform.position = Vector3.MoveTowards(transform.position, target, delta); // move towards        //target

        if(transform.position == target)
        {
            Destroy(gameObject);
        }
    }
}