Attempt at Object Pooling failing miserable, works about 10 times then suddenly quits without errors

Hey guys, I have an enemy firing bullets. I'm trying to use object pooling on this bullets and it's just not behaving the way I expect it to. It works just fine nearly 10 times, but then halfway through the 10th firing the bullets deactivate halfway to the target, and then from there on out activate and deactivate almost instantly in the enemy's muzzle. Here's the relevant code:

On the projectile object:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections.Generic;
3.  
4. public class BaseProjectileScript : MonoBehaviour
5. {
6.  
7.     [SerializeField]
8.     private float speed = 10f;
9.     [SerializeField]
10.     private float range = 40f;
11.     [SerializeField]
12.     int damageDealt = 5;
13.     [SerializeField]
14.     DamageType damageType = DamageType.Normal;
15.  
16.     //object pooling
17.     private float distance;
18.  
19.     //read only properties
20.     public float Speed
21.     {
22.         get
23.         {
24.             return speed;
25.         }
26.     }
27.     public int DamageDealt
28.     {
29.         get
30.         {
31.             return damageDealt;
32.         }
33.     }
34.     public DamageType DamageType
35.     {
36.         get
37.         {
38.             return damageType;
39.         }
40.     }
41.  
42.     // Update is called once per frame
43.     void Update()
44.     {
45.         transform.Translate(Vector3.right * Time.deltaTime * speed);
46.         distance += Time.deltaTime * speed;
47.         if (distance >= range)
48.         {
49.             gameObject.SetActive(false);
50.         }
51.     }
52.  
53.     void OnTriggerEnter(Collider other)
54.     {
55.         if (other.tag == "player" || other.tag == "engine")
56.         {
57.             UnitBaseScript unit = other.GetComponentInParent<UnitBaseScript>();
58.             unit.ApplyDamage(damageDealt, damageType);
59.             gameObject.SetActive(false);
60.         }
61.     }
62. }

On the enemy unit:

Code (CSharp):

1. void FireProjectile()
2.     {
3.         //TODO: Add audio
4.         //audio.Play();
5.  
6.         //set the next fire time to be after a set reload time
7.         nextFireTime = Time.time + reloadTime;
8.  
9.         //set the next movement time to be after a pause during the shot
10.         nextMoveTime = Time.time + firePauseTime;
11.  
12.         //calculate just how much error the next shot is going to have
13.         CalculateAimError();
14.  
15.         //instantiate the projectiles and muzzle flashes
16.         foreach (Transform muzzleFlash in muzzleFlashes)
17.         {
18.             float size = UnityEngine.Random.Range(0.9f, 1.1f);
19.             muzzleFlash.localScale = new Vector3(size, size, size);
20.             muzzleFlash.gameObject.SetActive(true);
21.             StartCoroutine(DeactivateMuzzleFlash(muzzleFlash));
22.             ;
23.         }
24.  
25.         foreach (Transform muzzlePosition in muzzlePositions)
26.         {
27.             for (int i = 0; i < projectiles.Count; i++)
28.             {
29.                 if (projectiles[i].activeInHierarchy == false)
30.                 {
31.                     projectiles[i].transform.position = muzzlePosition.transform.position;
32.                     projectiles[i].transform.rotation = muzzlePosition.transform.rotation;
33.                     projectiles[i].SetActive(true);
34.                     break;
35.                 }
36.                 else
37.                 {
38.                     Debug.Log("pew");
39.                     continue;
40.                 }
41.             }
42.  
43.         }
44.     }

 

Oh...oh god, I'm an idiot. It was my distance variable. Of course...I wasn't resetting it so it was always instantly deactivating after a certain point. Sorry for wasting anybody's time.