Quote Originally Posted by bhcolex50x View Post
can you elaborate on what you mean by vacuum hole in bottom of syringe and also how to do so? I'm interested
Once your done drawing your gear pull out your pin and draw a tad bit of air into the syringe. Now once you go to inject ensure the small air bubble is at the top and the last thing to be injected into your muscle. The bubble will push all the gear through leaving a clean syringe.