
I know Lucy. I use the Relion syringes too and that is why I got the calipers. Sometimes the zero marking is almost at a 1/2 unit mark.![]()
A lot of us have found that the markings on syringes are not consistent. Have you ever thought about using calipers? http://www.felinediabetes.com/FDMB/threads/dosing-with-calipers-updated-w-videos.79851/
Or you can try finding a syringe where the zero line is where it should be and making a sample syringe with colored liquid to compare you syringe to each time. But if the plunger gets moved, it won't be accurate any more.
I know how you feel Lucy. The BD ones are not very good either. I have taken to counting drops and using the BD ruler as well. Waste several units at each shot time doing this, but it's better than nothing.