What sort of vaping method are you using? I find that the method by which you vape greatly affects the stone. For example, my experiences with herb in the VaporBros style whip attachment hot air vapes, the ones where you suck from a hose, provide comparatively aenemic vapour, and a stone that doesnt seem to last very long (compared to smoking herb), while a blown air bag filling vape (like the volcano) tends to provide thicker, milkier vapor (by virtue of the potentially very slow blowing action, slower than a human could be whilst inhaling), and a stone that is a bit harder hitting, but still seems to top out for me at ~20 minutes long. Vaporizing concentrates like BHO I find to be more of a "whole" feeling stoning experience that lasts much longer than smoking does for me and takes me much higher, bc if its done properly, a butane extraction can extract cannabinoids that are inside the plants cell walls making a vaporizable extract that is representative chemically of the whole plant, whereas the hot air style vapes only evaporate off the resin from the trichome glands outside of the plant, which is much proportionally lower than the whole herb in the secondary cannabinoids like CBD, CBN, THCV, and many more. This is important as many of the medicinal effects of the plant have been tied to these various "secondary cannabinoids", which for my use makes them the primary ones I am concerned about extracting! If you''re serious about health and vaping and want to go the BHO route, be sure to clean plate test your butane for purity, and use a dome pipe, concentrate bowl and wand, a fritted disc, or a ball pipe type setup - any of these use gentle indirect heat and provide for efficient vaporization. Avoid nails, ecig based "vape pens", hot knives, and skillets, as all of these expose your oil to red hot heat far above its combustion temp, meaning you burn quite a bit of oil with those methods, leaving you a bit better off than smoking herb but still generating soot and carcinogens and turning a 2 hour vapor stone into a regular old 40 minute smoking high. For in depth information on every method Ive mentioned and quite a bit more besides, check out the link in my sig. It also covers how to determine butane purity and several common pitfalls to be avoided by those first starting out on vaping. Best of luck!