Re: Shipping a gun?
Long guns can be shipped via USPS or common carrier(UPS, Fedex, etc) directly from the owner to the FFL(gun manufactures are FFL's too), then the gun can be shipped directly back to the owner. For the common carriers, you'll have to use an actual depot because those box/shipping stores are just franchised storefronts, and the management are typically ignorant of being able to ship things.
There are forms to declare when shipping that need to be filled out whether you ship via USPS or common carrier. Also, common carriers often require overnight shipping which inflates shipping costs greatly.
You may find that shipping it through a local FFL might be cheaper.
For handguns, only FFL's can ship via USPS. Us regular folks can only use a common carrier.
If you have to track your game, then you aren't using a big enuff gun.