So I'm doing my hcg daily with a 30g insulin syringe. No problems there.
On Mondays and Thursday are my test shots. .375ml

So I'm loading the hcg first, then the test (same syringe)

I pull in 100iu of hcg, then I pull in my test. Here's where my question comes in.

Since we're talking oil vs water base, they stay separated. So for a while, I've just assumed when I get to .475ml I'm done.

But today, when I drew the test and total volume went to. .475, I noticed the test was only at about the .300ml line.

I understand that you don't get everything out that you draw. But am I under dosing by drawing to .475ml total volume? Or am I over dosing my drawing the test to the .375 line?