I have a feeling you are right about banning all imported ammo at some point. I hope it never happens but the way things are in this country it's only a matter of time.No, the BATF always sucks.
I'd much rather shoot a non-corrosive round, but the spotty availability and 10¢ per round higher price makes/made the 7n6 a much more attractive round to shoot. Now they'd better get to ramping up on Wolf, Bear, and Golden Tiger, as there is one hell of a big void to fill. I'd load up on x54r while you can; I'm sure they'll find a way to halt importation of that at some point, too.
I've been trying to tell people that sooner or later, all imported ammo is going to go away. I still believe that.