One of the biggest problem for US Hunters returning (and leaving) with firearms is the inconsistency at the various airports and individual officers. I have had problems every time in New York/New Jersey and California airports, not much at any of the others. In every case I have simply cooperated with whatever they asked for, even when I knew it wasn't necessary. It is very obvious when you go thru airports that are in states with generally antigun/antinunting state governments that it is much more difficult. I know we are theoretically protected by Federal Laws when travelling, but that doesn't help much when the NY/NJ transit authority won't let you board your plane without a second inspection after the Federal authorities have already done theirs. The problem is not that I couldn't have argued and educated them (since I always carry the relevant rules, laws and paperwork) but rather that they can certainly slow you down and guarantee that you won't make your connecting flights. This is similar to the present situation in SA, obviously a new 4457 serves no purpose, but if getting one avoids difficulty it is an easy fix. One tip, I get each item on a separate 4457, again I know this is not required, but after reusing a 4457 that had several guns on it from a previous trip, only one of which I brought on a second trip, and on returning to the US being threatened and harassed about what happened to the other guns for an extended period I find this another easy solution.