Actually, wouldn't it be more than that? He's not just extracting the CBD. He's also extracting the other cannabinoids and terps. Weight-wise, wouldn't it be about the same as you usually get.
I get about 10% return on rosin. I don't do BHO so I don't know what your regular return would be.
I would guess you'll get about 10 grams but the resulting extract will be more terpy and higher CBD that usual.
Love to hear your results. I am growing a high CBD strain right now and intent to extract most of it.
i do a lot of cbd in the cls then distill it for purity
the op stated it was 4-6% cbd and 0.3% thc
fyi,cannabis creates cbg in small amounts then enzymes like thc synthase or cbd synthase convert the cbg into thca or cbda,the acid forms and while doing so uses up most all of the existing cbg
other cannabinoids are are pretty rare in larger than trace amounts in most drug use cannabis
from my experience and extensive testing with my gc-fid, the
terpenes will be a minuscule amount and the other cannabinoids will be traces at best so the extra oil? would be lipids,waxes,chlorophylls, etc(aka junk that you don't want)
if you get approx 10% return with rosin? then i would guess that your material is at least 12%
fwiw