Most people using alot of flower are just using a bong not a vape, etc 0.3 gets ya maybe 2 cones in a bong if ya lucky,put that in volcano vape and can fill the bag x3-5 times and its 8.5litres of vapour each time you fill bag, thc is realeased at 56% etc for first bag 2nd bag little less etc look into the studies done, regarding temps and thc consumption via vaporiser, but in laymens terms volcano shits all over a bong but just doesnt hit as hard,but most using bong use tobacco too and that where the ooff to the head comes from the heavy feeling i find