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yes compressionless cable housing and proper brake cable - no tight bends
when i pull the pads hit the rim fineit could be cable pull issue, i have the pads right on the edge of touching the rim though as its true, and almost immediate contact when pulling - i can then pull more on the lever but the braking power does not increase :(
perhaps its the track !
anthonyj-
If you can move the levers more after the pads are touching the rim and power isn't increasing much then there's compression somewhere. You should be able to see some flex in the caliper if you look at it while pulling the lever.
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i can then pull more on the lever but the braking power does not increase
^ What he said.
If the lever is moving, the caliper arms aren't.
Either you have some slack in the cable or your calipers are made of blancmange.
PhilDAS
Scilly.Suffolk
What, specifically, are the rims? If they're old/budget, then the brake track could just be shit and you'll have to suck it up.
Compressionless cable housing? Good routing: no tight bends or doubling-back?
Maybe try different pads: not all pads perform well with all rims.
The latest Shimano calipers do have increased mechanical advantage, but I doubt your levers pull the same amount of cable as current ones do.