No just put it on the money of where you want to hit. At ten yds the bolt is moving fast. This is with a relaxed deer. I assume that you are using a twenty yard dot. My son just did this on Saturday and perfect double lung.
Good to practice the shot before one launches an arrow at a live animal. Also consider the path of the trajectory as it relates to the vitals. The closer the deer below a tree stand the smaller the kill zone. They say aim for the exit point. If you want a good quick humane kill...you need to hit both lungs.
One mistake new crossbow shooters make is to aim like it's a rifle. Looking down the stock, through the scope, it's almost instinct for a rifle shooter to aim right behind the shoulder and the lower 3rd of the chest. A fatal heart shot with a rifle. With a crossbow from a tree, this could end up being a low, single-lung hit. With a bow, I naturally aim in the middle of the chest (height-wise).