Congrats on your mini-harvest! I believe the weight drops by 75% or something like that, so basically half what you weighed, and take another 25% off and that's what you're left with in the end.
I wouldn't be suprised if what you're growing is White Rhino! Your bud looks super frosty. I wouldn't think it's just some everyday bagseed but some pretty dope stuff.
So your plants have been flowering for 10 weeks... Quite a while! Keep us posted smoko, great work!