Speaking to my dad, who ran MCAF Yuma in 1960, "Toss bombing" was developed when the bomb became too powerful to outrun. IE the blast effect would destroy the plane. Many planes were tested including the AD-1. In fact he tells me in 1961 the target was a 1000 foot circle in the desert from 10 miles. A USAF jockey hit it !
I too, am glad they never needed to try it under combat conditions! The winner in a nuclear exchange is still the looser.