Opioids Mass to Volume Conversion for Powdered Poppies

[Oakstone]

(First post, by the way.)
I have a somewhat small amount of dried poppy (somniferum, obviously) pods, which I have ground to a quite fine powder.
I have also ordered a very precise scale (down to 10 milligrams), but will not be receiving it for quite some time, and the scale I am currently in possession of isn't very good.

So, my question for you all is; does anyone know a rough estimation for, say, how many grams of poppy powder there are per tablespoon, or how much volume 5 grams would take up?

 

[sekio]

It depends too much on particle size, moisture content etc.