The roots for the modern word slay go very far back with a basic meaning of 'to strike' or 'to beat.' So shooting and bombing are definitely in that range, sinc

The roots for the modern word slay go very far back with a basic meaning of 'to strike' or 'to beat.' So shooting and bombing are definitely in that range, since they involve a bullet or shrapnel or a concussive force striking and killing. The reason it seems inappropriate is because it is archaic. P.S. The better past tense is slew, not slayed.