Adjusting the handbrake cable tightness with drums

[brainbug007]

So I'm trying to set my drums up properly now and struggling with the handbrake a bit. I know the cable should be fairly tight when the handbrake is off and then use the dial thing with teeth at the top of the shoes to adjust it. But I can't seem to get the right level of tightness as I'm assuming when the drum goes on over the shoes and the handbrake is off there shouldn't be any resistance while trying to turn the wheel by hand, and then once the handbrake is applied the drum should lock up? If that's right I seem to either be too loose or too tight (to the point where I need to whack the drum on with a hammer). Anyone got any pointers where I'm going wrong??