basically i used iv heroin for three years and then got off for three years. i have currently been blowing it for the past 8 months. i want to bang again but all the dope changed here since i used to do it. i dont go crazy with it as i only blow down a .03-06 at a time. my question is what is a safe dose bcuz back in the day i never went by weight i went by how ever many stamped bags. which are not around anymore..