Question Animation time doesn't match the time passed

Hello. I get the animation times using:

Code (CSharp):

1. AnimationClip[] clips = animator.runtimeAnimatorController.animationClips;
2.             foreach(AnimationClip clip in clips)
3.             {
4.                 switch(clip.name)
5.                 {
6.                     case "Equip":
7.                         equipAnimTime = clip.length;
8.                         break;
9.                     case "Shoot":
10.                         shootAnimTime = clip.length;
11.                         break;
12.                     case "Reload":
13.                         reloadAnimTime = clip.length;
14.                         break;
15. }}

and change my parameters in animator like this

Code (CSharp):

1. animator.SetBool(shoot,true);
2. waitforseconds(shootAnimTime);
3. animator.SetBool(shoot,false);

But parameter "sometimes" becomes false before animation ends and animation switches state. So time is not passed exact like in animator. How can I fix this? Should I use exit time or something like that?