Gun Shipping Regulations?

[King Paul]

I just Purchased a gun via check from a relative it is a ruger mini-14 i was just wondering what kind of channels i have to go through to get it mailed to me i live in washington state and he lives in oregon i know there are different regs for a long gun than a hand gun so if someone could tell me the most painless (financially) and stress free way to get my rifle in my gun cabinet i would appreciate it