Density, and therefore weight, varies with types of extraction, source of MHRB (Brazilian vs. Mex, etc), as well as the specific products used for extraction.
When comparing 2 seemingly similar sized volumes of spice, from different extractions, etc., I have seen a twofold difference in weight...............
Therefore, eyeballing, IMHO, has about a +/- 50% or more variation..............
Not really something you want to HOPE that your doseage is proper.........!!!!
Just saying.............
Get a scale, or stick to beer...........
I am certifiably insane, as such all posts written by me should be regarded as utter nonsense or attempts to get attention by using totally fictitious verbiage...........
The above refers to the fictitious 'I'