I always preferred 1cc, since it can hold more. Although, as of 10/31/16, it's been a year since I shot heroin, or anything else, for that matter. I get by just fine on Oxy 20mg IR, and simply take them orally. Over the past year or so, although I miss the rush, I can't see me going back to the needle. This length of time has put things in perspective for me. Sure, on some level I do miss the whole procedure of shooting up, but the longer I'm away from it, the easier it is to stay away.I'm very grateful for that, I might add. This whole thing has been a blessing in disguise, believe me.