retfed, if you want a current chart, as Blue68f100 said, you could build it using powders that you use.
But, I find using an interpolation method works well. You do remember that from high school math and science?
Basically, for powder charges/powder measure settings, it says that then ratio of a micrometer setting divided by the powder charge is the same for a particular powder at different powder measure settings.
It assumes the graph is linear, which it isn't but large changes gets you close and then making small adjustments, the graph is linear enough.
So, when I am preparing to set my measure up for a new powder charge with a new powder, I'll guess a starting point. I'll then calculate a new powder measure setting by the following:
(New powder measure setting) = ((First powder measure setting)/(First Powder charge weight))x(New powder charge weight)
Reset the powder measure and repeat the process and calculation
Granted the graphs are not linear but making the first correction will get you close. The second and third corrections will be small and should get you dialed in to the desired charge weight. Small corrections need to be made to get you dialed in to exactly the charge weight you want.
I record the powder measure micrometer setting for all my reload batches. It makes it easy to return to the desired setting although it always seem to need a little tweaking for each reloading session.
Also, if you record the setting, you have a starting point if using a different powder charge for a different cartridge using the same powder.
Hope this makes sense.
This a big reason that all my powder measures have micrometer metering.
Once you've used the powder measure for a while, you will have a good data base of starting points when you venture out to differ loads and cartridges.
