I have been trying to always measure the exact dose out accurately and exactly .6ml and I use a 3cc syringe. The black lines on the syringe are a bit thick. Do you pull the plunger back until your on the top of the .6ml black measuring line. Or to you go to the bottom of the 6ml black measuring line? I know its a tiny amount but like i said above im trying to now always measure it accurately. Which would it be?