This has nothing to do with public safety and everything to do with making it more difficult for people that reload.
This, but not really to make it difficult to reload, that's not really his intention.
He wants to regulate both BP AND smokeless propellants,
"in any quantity".This isn't to hurt reloaders, its to regulate AMMUNITION. Since there is no quantity specification, "individually packaged" 10-100gr lots would probably be regulated...meaning ammo.