Better pay real close attention to WHO is telling you WHAT, in relation to WHO's laws.
Canada allows you to import ammo. No big deal. The US does not allow you to EXPORT it or possess it (with a few exceptions for hunters, and Target Competitors). Carrying it out of the US is exporting it. You need a permit. You cannot get a permit unless you are a US Citizen. That's the one that'll getcha in the ass. Waving around Canadian rules, when you are in the US is gonna get you laughed at. And still in trouble.
Don't call me. Call a Lawyer. Hope you never need to. All you'll get from me is laughed at for being stupid. Maybe an inquiry as to what good stuff is being sold to finance your legal bills. No sympathy.
I'm really trying to do two things. One is to warn off the stupid, from doing stupid things, the other is to make it plain that, if you have not read the laws that apply on both sides, you could find yourself in a world of hurt. Maybe the next guy that is looking for some SSS will do a search (and have it work) and find this post, and save himself the trouble.
As to the likelihood of SSS being brought in in qty., I'd suggest it's pretty slim, if at all. Guys will not continue paying a lot for ammo that does not shoot well. Look at the perpetual whining that goes on about the Ruger 10/22, if you want to see what the internet complaints dept. looks like.
I know one or two fellas that have had some and shot it, and posted the results here. If you were shooting a silenced AR, with a rimfire adapter, and a faster twist barrel, it might be worthwhile. Otherwise, it's not money well spent.
But it MUST be better, because we can't get it here, right? Not so much.
Cheers
Trev