is it vials or ampules? either way, make sure the tip of the needle is in the juice all the way. pull the plunger slow and let the liquid pull in on its on. even after you've stopped pulling you should still see some liquid pulling in from the suction it creates and that should fill most of the air gap. 23g is small as hell for oil based gear. i use 22g and most people would say thats to small. i know its in my ass for a hot minute trying to push 2ml through a 22g, so i cant imagine how long YOU gotta leave it in dude!

Yes, drawing with a larger sized needle should help speed up the process. As well, if you are not already switching needles from the one you are drawing with and then injecting with you should be doing this regardless. It is not 100% necessary but when injecting the needle will be sharper and the injections will likely go smoother for you.

Thanks fellas!

I draw with an 18g and drawing is smooth and easy.

you are injecting the same amount of air into the vial as you want to draw out arent you?