Re: Hunting in US?
There is no problem at all. Obtain a WA state hunting licence first. Get a form 6 from the ATF (may be downloadable from their site). Complete the form with your personal & gun info that you will be using in WA. Send it along with a copy of your WA hunting licence to the ATF and wait for import approval. If you hve not have had any felony convictions or prohibitions from weapons, dishonerable discharges etc. in either country, you should be good to go.
THE FEW THE PROUD, SEMPER FI