You have to register your guns and ammo with the US Department of Justice Bureau of Alcohol , Tobacco ,
Firearms , and Explosives . The form is on line , and has to be repeated yearly . You also need an invite
letter to a club in the US .The turn around time is about a month to get the form to get stamped . You
have to present this form going into the US .
In Canada you can either get your guns listed on a green card , like used for cameras and other valuables
or , last year the Canadian border guard just stamped my US form with Canadian approval .
It seems like a lot of hassle , but once on your computer you can reprint it and send it off each new year .
The Canadian green cards don't have to be repeated every year .
Travel through the border with my guns and ammo has been very easy with all the right paperwork .
Good luck with your benchrest shooting . I have found that ammo is the deciding factor in rimfire
shooting . You must find the ammo your individual gun likes , then it is practise time .