Critical damage to Ammo.

Good morning guys, so I'm trying to make the player's ammo do critical damage.

So I made this code:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Munição : MonoBehaviour
6. {
7.     [SerializeField] float Speed;
8.    
9.     public int Dano = 1;
10.  
11.     public ParticleSystem Explosao_Tiro1;
12.  
13.     public float danoCritico;
14.    
15.     void Update()
16.     {
17.         transform.Translate(Vector3.up * Time.deltaTime * Speed);
18.     }
19.  
20.     void OnCollisionEnter2D(Collision2D collision)
21.     {
22.         if(collision.gameObject.CompareTag("Inimigo"))
23.         {  
24.             ChamarRandom();
25.             Destroy(gameObject);
26.             Instantiate(Explosao_Tiro1, transform.position, Quaternion.identity);
27.         }
28.  
29.         if(collision.gameObject.CompareTag("Parede"))
30.         {
31.             Destroy(gameObject);
32.             Instantiate(Explosao_Tiro1, transform.position, Quaternion.identity);
33.         }
34.  
35.         if(collision.gameObject.CompareTag("MuniçaoInimigo"))
36.         {
37.             Destroy(gameObject);
38.             Instantiate(Explosao_Tiro1, transform.position, Quaternion.identity);
39.         }
40.     }
41.  
42.     void ChamarRandom()
43.     {
44.         float randDroop = Random.Range (1, 100);
45.  
46.         if (randDroop <= danoCritico)
47.         {
48.             StartCoroutine("Critico");
49.         }
50.     }
51.  
52.     IEnumerator Critico()
53.     {
54.         Dano *= 2;
55.         yield return new WaitForSeconds(5f);
56.         Dano = 1;
57.     }
58. }

But it didn't work, does anyone have any idea why it didn't work?

Thank you very much in advance

 

put your critical damage as a probability, like

Code (CSharp):

1. float criticalChance = 30f;
2.  
3. //cal it at random probability
4. if (Random.Range(0,100f) < criticalChance)
5. {
6. //critical hit here
7. }