Don't be surprised if it takes several tries before you get this perfected. Its worth the effort though, if you are struggling with trigger control your problem may just be that you are searching for the trigger. I have shot my release like this for over a year now with good success. Hope you find this useful. I also special order heavy springs from Carter to slow the release down.
Fast triggers are an invitation to form problems that are hard to resist.
You can relax with a slow trigger with the knowledge that it will never go off on you before you get settled on the target.