I'll only go 1cc max of Enan, or deca thru a 25ga. I can push sus thru a 25, but it seems thicker.
It gets F'n cold in winter where I live, so that can be a prob.Warm it or go bigger. Got be carefull w/ big temperature changes to fast on a opened multidose vial. Can cause condensation/ moisture to form inside. Crystallization.
I push 1/2 to .6cc thru slin pins (load from back, pull the plunger) into real thin skin areas.
Never had a problem. Stanoz, Ive had nothing but problems with anything other than 23ga.
All human grade stuff.