I cook with my 190/160 bubble hash all the time, there is plenty of THC left. It is also a lot easier to make, as it just melts into the butter, no need for cheese cloths or straining.
Question for you Matt - Does the Hydro Logic Small Boy clean up city tap water well enough to make bubble hash? I just picked one up for my veganic grow and was hoping to also use this for bubble water as well (my city water is horrible so I have been using bottled water for my small runs).