I don't know why anyone cares. The Feds say you can't use lead shot on ducks, they also say pot is a Schedule 1 drug.
I don't see anyone writing tickets for all the pot heads in Oregon, but they do if you shoot a duck with a chilled load of 5's?
Screw'em
If you steal less than 1000 dollars from a store in California, you get a pass. Get caught hunting with lead bullets get a fine and lose your gun.
