Depends on the situation. I have let two bucks that I think may have been 4.5 walk this season. I had already killed one early on in the season, and my wife also killed one, so it's not like we are short on meat. Hoping still to get my son his first deer too, so that factors in. If it was the last day of season and I was convinced the deer would never amount to anything better than it was while i was watching it, I might squeeze the trigger. Honestly can't put myself in that moment without physically being there. I can say though that the two I shot with my phone camera earlier this season just didn't trip my trigger.