I once noticed a commotion in the weeds and leaf littler of some debris behind my garage. When I checked what it was, I was witness to a fair sized king snake aggressively pursuing (and eliminating) what I believe to have been a smaller copperhead. It was a treat to get to watch an event we so rarely get to witness.
Loc: Republic of Texas
Good for you moving a harmless snake to be on his way to do good things! Many of the pinheads on the board would have killed it while screaming like a little pre-teen girl. Although it may have struck at you, this is only because the snake was startled. Once picked up, they calm down very fast and are completely harmless.
King Snakes defiantly do damage to other harmful/varmint critters. When they no longer find prey (eliminate the mice & rats in most cases) they move on.