But there is a reason the non compliant constituent of the powder is in there surely? If you change the constituent you change the powder, burn rate etc. so it won't be the same. I also think you probably overestimate the importance of the european market to the US manufacturers, it must be tiny compared to the home market, particularly with the amount of people already using european powders already. Look how hard it was to get Varget etc. a while back, the US market can absorb the whole supply I'm sure and why would they change powders and risk people at home changing from them. We'll be left with the newer powders that already comply, like CFE 0.223 etc. there are already compliant powders so they'll not be losing the whole market either.
Interesting that superperformance is on the list though as thats relatively new, or at least its availability of the product to reloaders is......