I'll GUARANTEE that they will go up! How much is dependant on LOTS of issues, like copper prices, lead prices, brass prices, etc. The manufacturers will raise prices until nobody buys it, then come down a little.
Hired Gun, wanna bet? Projectile prices have already jumped some, and the bet is that primers and powder will too.
The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.