Dose - Measureing dosage with pure powder

[mikeleeds]

SWIM got some pure BZP from the internet for research. (in UK)
He wants to know the best way to measure out dosages for consumption, of 200-400mg.
Presumably he should mix the powder with something like icing sugar 1:4 then take 1-2g of the powder?
What do people reccommend mixing it with? This BZB dispolves very quickly in his mouth, is acidic and bad-tasting if you dip & lick a fingertip of it!
He is not a drugs baron so doesnt have great experience with this and the best scales he has were for pyrotechnics and go to 1 decimal place although he doesnt really trust the 1/10g place (Made in china) but has never tested.

He doesnt have spare enpty capsules either (Should he get some?) can this be ingested somewhere thats not stomach, like in a drink? Measuring volumes accurately is easier than mass...

PS he has a lot (30g) of it so has time to have soem fun. Plus, whats an OD leval, and what happens if you OD?