I will admit to not knowing the law regarding the ammo but if you can feasibly ship the gun from MT to AK in order to prevent any issues, that's what I would do. I would then buy my ammo at my destination. The costs of unknowingly getting into trouble will far outweigh any extra ammo expense. If you are using special hand loads, ask whoever you are shipping the gun to if they know of anyone who may do custom work for you.