Points should be set between .016" - .020", but I hardly ever get anal about measuring the point gap (I used to use a matchbook cover to get in the ballpark).
Instead, use a dwell meter and set them for 44º-46º for new points, or 42º-44º for used points and make sure there is no pitting on the point surfaces (little mountains opposite little craters). They can be filed by an experienced professional but points are pretty cheap so that's not worth it anymore.
Speaking of that, try really hard to find original Bosch points for these distributors (I'm assuming you're running a 009). The rest are simply junk.
To that end, I agree with the others that, in this day and age you should be running an electronic ignition and be done with it.