RE: I think I found a poachers' set!
I personally feel that it is a pretty touchy situation. Is it your property on each side of the hedge row? If it is not, it is hard to say he is trespassing, escpecially if he is coming in on some other property. If it is not your property, contact that land owner on the other side and ask if anybody has permission to be there. If he says no, well then the both of you should take action. If he has permission, go and talk to him and remind him that if he shoots on your property he is trespassing.