I am trying to create a shooting game for air rifles and pistols, maybe rimfire too?

Tried to shoot a non-moving bouncy ball (1.25") with a RWS 34 at about 10'. Not easy. If you nick the ball, it doesn't move much. Hit it square with a .177 Crosman wadcutter, sends it about 10' or so. Moving, it will be insanely hard.