You're hunting deer with a .256 Magnum?
Bit light, but with carefully chosen shots it should work.
You could probably get into reloading for well under $100 if you went with a Lee intro kit, but the real problem is going to be dies. I'm not sure that anyone is making them anymore, which means that the ones you do find are probably going to command a premium.
Midway has them from Hornady Custom for $52 and change.
The RCBS Custom are $126!
Dang...
Save your money and get a .30-30!