Reloading isn't the magic answer to bans, though, since primers are fairly difficult to make from scratch, and the brass is almost impossible to make from scratch. Likely most folks would have a hard time with smokeless powder, too. Therefore, while reloading is generally a cost-effective way to make your ammo money last longer, it isn't likely to be overlooked if the gov't tries to ban ammo.
I own a percussion-cap revolver, and while lead balls, felt wads, and even black powder are fairly easy to make from scratch, I'm not so sure about the percussion caps themselves!
I believe the best way to prevent ammo (and gun) bans is to have plenty stashed away in a cool, dry place already - so that the ultimatum described in the Declaration of Independence can still be carried out if needed.