Smokeless powder is classified as a solid flammable, NOT an explosive. If it were anywhere near as dangerous as the OP suggests, it would be so highly regulated that we wouldn't be able to buy it. On top of that, nobody would be willing to handle it during reloading, and factory ammo would cost 10 times what it does now!
Use common sense while handling it or when around it (don't smoke, don't set it on fire), and you'll be fine. As stated above, if powder starts sticking to your measure or scale, wipe it down with a dryer sheet; problem solved.