jockonjuice
Beauty
Also a little bubble about a 10th of a ml kept at the plunger and injected at the end on top of the oil will clear the oil that would have been left in the pin.
a 1in 23ga pin will retain 1/10th of a ml. If you draw 9/10 of a ml then a little bubble of air you will get 10 1ml injections from a 10ml vial and inject all of your injectable compound.
Sometimes you feel a little pop at the end.
Do you inject in your quad? Otherwise how do you get the bubble to stay at the top?