A few notes before I get started.

I'm left handed. A lot of what you'll see is backward for righties.

As mentioned, this is as basic of a shooting board as I can make. From start to finish it took roughly 20 minutes.

I do not cut miters with hand tools. As such, this is a 90 degree only shooting board.

I have much longer shooting boards for edge shooting.

For something more traditional and allows the flexibility of shooting miters, I highly suggest the shooting board Paul Sellers builds here.

I made this to use a #4 smoothing plane. This is not my primary smoothing plane. End grain is very difficult on cutting edges and blunts them faster than face grain will. I would not want to use my primary smoothing plane for a lot of shooting work