what is the angle for a high powered rifle bullet back stop or catch for sightyng in?

Answer 1

I don't know if I would worry about deflecting bullets as much as catching them, go down to the tire store get enough tires to build a wall covering your backstop fill them with sand and you will never have to worry where that bullet went.The tire store should be willing to give you as many used tires as you want

Answer 2

90 degree.