The people most immediately and most seriously impacted by this are the recreational shooters shooting semi autos in mostly Soviet calibers. Their "cheap blasting" ammo is going away and is already about gone.
This isn't so much a serious assault on our rights, but it is a huge shot against the affordable fun factor. And its being done simply because they can, and do so under the cover story of "punishing" the Russian govt.
If I've got it right, it seems that the reason we are doing this is not because the Russians poisoned a political opposition leader, but because they did so with a chemical nerve agent they has signed a treaty promising they wouldn't use.
Not explicitly stated, but strongly implied, of course. We're not "punishing" them because they killed some poor guy, but because what they used violated some treaty. Or so it seems to me....
I'm sure that doing what we (our govt) is doing is considered a win-win by the administration. Sends a message to the Russians, without doing anything that actually matters, and hurts the recreational shooting class in the US at the same time.
and, as far as US ammo makers, "taking up the slack" and producing steel cased ammo, that isn't going to be happening in the near future. AFTER the US ammo makers catch up with demand for standard brass case ammo, and then have some excess capacity (or the funds) to invest in making replacements for what was coming from Russia, then, they may look into doing that, but only AFTER they catch up with demand for what they're already making.
and, I don't think that will be all that soon. Hope to be wrong, but don't think I am.