Honestly .25 of average-mediocre BTH is not an unreasonable amount, it's actually a pretty average amount for a dose. I've been off and on it for bout 4 yrs now (this most recent period of use I'm only being about 7 months in, and i already am back to doing .20-.25 per shot, 3x a day AT LEAST. (More like 5x a day when i'm actually trying to get loaded...) Thank God i have one of the better connects in my local area.. His prices are significantly lower than every other douchebag, wanna-be "hustla" in my town.. He does things that way to keep steady business coming in of course, but he told me the biggest reason overall to make sure all his clients and/or friends were always well and happy, as well as supporting his own financial and dope requirements.
On the other hand, if the quality is FIRE, like it is a good 2/3 of the time, i can cut that amount down to more like .10 per dose and get the same or possibly even stronger effect than i would get from the much larger dose of the normal dose of the average street level dope.
The main thing that SUCKS about BTH, is how unpredictable potency is. The potency of BTH fluctuates wildly, even over really short periods of time. Hell, you can break off 2 different pieces of the same ounce that are the same size, and one of the pieces could be weak while the other knocks you the FUCK out.. i must add, that when you get your hands on those less common, suuper killerrrr batches of BTH, it rocks your motherfucking WORLD!( IMO even more than average-good potency #3 and #4 powder H.)