Bullets and there Direction and rotation

Hallo

I am very new to Unity ( especial C# and the API ) and I am currently following on a Udemy course to learn some of the basics.

I made a character that looks at your mouse pointer and can move and jump in 3D space not problem.

The problem i have is that I create a gun and Bullet prefab and the scripting to fire the before mentioned. Except my results are very weird. Shooting on a axis that's not X the bullet will either stop and drift to a side and spin out of control. If you press back and fire in any direction it works as intended.

I am very sure I have transform problem and I have tried to use transform.forward and transform.right to no effect.

My code :

Gun Logic :

Code (CSharp):

1. public class GunLogic : MonoBehaviour
2. {
3.     [SerializeField]
4.     GameObject m_bulletPrefab;
5.  
6.     [SerializeField]
7.     Transform m_bulletSpawnPoint;
8.  
9. // Start is called before the first frame update
10.     void Start()
11.     {
12.  
13.     }
14.  
15.     // Update is called once per frame
16.     void Update()
17.     {
18.         if (Input.GetButtonDown("Fire1"))
19.         {
20.             if (m_bulletPrefab && m_bulletSpawnPoint)
21.             {
22.                 Instantiate(m_bulletPrefab, m_bulletSpawnPoint.position, m_bulletSpawnPoint.rotation * m_bulletPrefab.transform.rotation);
23.             }
24.  
25.         }
26.     }
27. }

Bullet code :

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class BulletLogic : MonoBehaviour
6. {
7.     Rigidbody m_rigidbody;
8.     float m_bulletSpeed = 10.0f;
9.  
10.     // Start is called before the first frame update
11.     void Start()
12.     {
13.         m_rigidbody = GetComponent<Rigidbody>();
14.         if (m_rigidbody)
15.         {
16.  
17.             m_rigidbody.velocity = transform.up * m_bulletSpeed;
18.  
19.         }
20.     }
21.  
22.  
23. }
24.