That would be a real problem to all the flintlock shooters. I do not care what alternative powder you want to use, or duplex your loads, there is nothing that shoots like straight black powder. I have not heard anything of the sort being claimed on the different sites I visit. I am sure once or if there is a set date, there will be a mad rush on the stuff and people will stockpile. Until then lets all keep our fingers crossed and hope that all our rights to own items will not be taken away.