Just a Hunter: I hesitate to forward this to you but I have spoken with Game Wardens on more than one occasion and have had them relay how no one had ever been cited/prosecuted for shooting nest robbing Magpies!
DO NOT TAKE THIS as official policy of the Montana Department of Fish, Wildlife and Parks, because its not.
Take this for what its worth.
Magpies do WAY TO MUCH damage to nesting songbirds, waterfowl, Doves and upgame birds for me to even consider not shooting them under most conditions.
Hold into the wind
VarmintGuy