I load .40 for .18
9mm would be a little less and 45 would be a little more.
Depends on how many primers and powder you're buying at a time.
If you go with 5k primers and a keg of powder at a time it will drive costs down.
Here is a reloading calculator website that helps a lot;
http://www.handloads.com/calc/loadingCosts.asp