If you get good with a pistol, through practice, it eventually becomes part of your body.
It is like pointing your finger at something. The sights are out of focus, as you are looking at the target, not the sights.
Concentrate on the Bug, not the gun and keep shooting. I only got one in ten shots.
I was not aiming for the heads, I didn't find any with the head still on it. All the body shots were lost in the woods that are only a few feet from the house, if it hit the head, then the bug simply dropped close to the house, and I found the six I photographed.
Keep shootin.
Cheers, david.
PS, the holes from the Carpenter Bees are huge in comparison to the small dents from a Wad-cutter @ 420fps.