Yeah, and it's illegal to carry California booze into Oregon, but I never cross the border without picking up about 5 gallons. Hard liquor is about 20% cheaper in California. The big stores on the border specialize in mass produced ethanol, but for mixers it is just fine. Some cheap whisky like Old Crow is actually pretty good booze. If you are looking for quality imported whiskey like Knappogue Castle, you are out of luck, so I buy that locally.
I'm sure there will be a thriving ammunition black market in California. I don't see any reason why Oregon businesses shouldn't pocket some of the profit. They don't even ask for ID here, unless you look like you are under 18. Even that is just for handgun ammo. A teenager can buy all the rifle or shotgun ammo he wants. Pay cash and the transaction would be untraceable. I recommend Bi-Mart, an employee owned membership discount store. There are stores in Brookings, Klamath Falls, Ashland and Medford. I'm sure they will start ordering more ammo to accommodate the California traffic.