So the way the property is laid out is the cop drove in the driveway from the street.  Had to walk up to and past the house.  Walked about 100 yards down the back of the property through a path wide enough for a truck to drive down, then get to an open area where we were shooting.  So he was deep onto the property, but here is the kicker.  The guy who owns the land, well his wife was in the house.  No one knows if his wife told the cop to go down to where we were shooting or not.  We don't know what she said to the cop or even if she had a conversation with him.  I don't think anyone bothered to ask if she gave permission or not.
I'm not the type to tell a cop to go pound sand and get a warrant because it isn't my property and I don't want to cause further headaches.  I was fine with showing him the Form4s.  Even though he stated he knows about trusts and nfa, that should have been the end of it but he proceeded to ask stupid questions like where is your trust, how to I know that is you, etc, etc.  I guess they always look to find a reason to bust someone.

He said he didn't know where the gunshots were coming from and was listening in the area.  Then he heard the FA.  He must have heard the FA and demanded to see the paperwork.  But ya, know way to know if it was FA or bump firing.