I have pre-loaded an entire cycle. Also I think the very experienced voices here might tell you the same thing. I would as splperformance suggested and get a 18 ga, or 20 ga. put it in the syringe originally and push it into the vial ...draw up the amount you want/need into the syringe, twist off the 18/20 ga needle, leaving it in the vial and replave the original 23/25 ga needle back onto the now prepared syringe. You can pre-loasd your entire cycle this way. Store the preloads in to a ziplock baggie, and store some place cool and hell why not dark too...(like bottom of your drawer) Now you're all set. I doubt you will find any difference in the potency or sterility if you take simple precautions like you should always be doing any time your talking about handling a subsatnce or the mechanisim through which you are going to injest something into your body...just my 2cents.