Allow me to break (no one’s) the rules. Sometimes I decant (filter) the peps into a cart, clear the air via the pen method, but the use it like a vial. I slap a label on that sucker and draw from it. I’ve never been one to inject air into a vial, btw.I used 3mL ones for TRT for years because I could get boxes of them, but I am using 1mL ones now because I can get those for free from work now too LOL
I didn't consider accuracy as much before since I was injecting larger quantities but since I started reconstituting with amounts such as 3mL BAC and injecting much smaller doses is when I noticed this
Sometimes it takes 2 carts, say if I do it this way with ginseng. That comes in those awful glass vials you have to snap off.
I like to switch things up, syringes & vials, syringes & carts, carts & pens.