Sh!t, that brings back memories,,,,
I learned to shoot with a .177 Slavia springer.
A mate and I used to climb up trees that hung over or near warrens, and sit and wait for them to come out.
Placed at 1/2'' below the base of the ear, or if directly above them, vertically down between the ears used to give excellent kills.
Mind you the old springers had nothing on the power of the air rifles of today.
I do not fear death itself... Only its inopportune timing!