As was said you may have pushed too much air pressure in the vial , hence it will put pressure all around the needle opening. Or a loose crimp. I have once had a top come off / loosen up n leak.
I don't like puncturing my rubber stopped with 18G. I see no reason to draw with any needle I am not injecting with
Really why, I can only inject so fast. So WTF is my hurry drawing.??
Guys do what you will, BUT for GOD's sake keep it simple. Shit you don't see the doctors and nurses having any problems.
Damn, I can get my gear out of my box. Open everything , draw and stab. Seriously just that simple. Slam dunk.
And if you are aspirating, stop
.. It just causes problems and PIP for the novice.
No need, to aspirate. The whole dynamics of IM injections shows the absent need for aspiration.
Good luck,....... OMM