Moreover, how long does it take for a spooked deer to come back?
Deer in general have a short memory and even if spooked where they bolt off they will return eventually. I have read that their memory is about 2 weeks so that may give you an idea. However, sometimes deer change their pattern do to an incident and then they just stick to the new pattern.
Subsequently, question is, do gunshots spook deer? The answer is “it depends.” I doubt deer are born with knowledge that the noise of a gun or the smell of burnt powder is often associated with danger. Deer can be conditioned to accept or reject smells and noises they associate with danger.
Also know, what happens when you spook a deer?
When a buck is badly scared, he knows that the source of his shock is a human and he knows exactly where that human was positioned at the time of the scare. He now associates that location with danger. Often he will turn inside out and bust out of the area. Maybe he saw you in the stand and realized you were a human.
Will deer come back after they smell you?
imo if you spook a deer in that area, they will return but they will 10x more cautious in that area. If they smell me, I usually lay off that spot for a few days at least.