[QUOTE=Knarley;5581424]
The weight/ volume is different from brand to brand.
yep -----not a huge difference though -- and can be unrelated to the energy of the powder
(Wano weighs heavy compared to Goex or Swiss - but it shoots light = lower energy per grains)
The size of the kernels, F FF FFFG, is different from brand to brand.
definitely ---- does it matter ?
I would suspect even from batch to batch will differ.
that too - but again only small difference
By the time you get it figured out, you'll have to start again.
some fellers like to spend their lives figuring stuff out - others of us just like to go shoot!