Ok, so a ban is a bit of an overstatement, however removing lead as an ammo component will drastically increase the price of ammunition. If you think ammo prices have been steep lately, you ain't seen nothing yet.
I can still remember when the BATF declared all steel core ammo to be AP (which was utter nonsense). That jacked up prices on military surplus rifle ammo by factor of three. If lead is banned, and steel obviously isn't an option, we're left with copper. Copper right now costs almost triple what lead does. If you place a huge amount of extra demand on the supply (you know, like by requiring it in bullets), the price will skyrocket.
So at the very least, this is heads up to stock up on ammo.