RE: I WAS SURPRISED?
 

I hope I'm not overstating the obvious, but just so someone doesn't mis-understand, I'll say it::eek: :
Black Powder DOES weigh the same as it's volume in powder measures; it is the standard, and what powder measures were designed to measure.
Black Powder SUBSTITUTES do NOT weigh the same- they are heavier for the same volume.
As CAYUGAD said, a 100 grain VOLUME of 777 onlyWEIGHED 68 grains. It is not wise to WEIGH out 100 grains of 777 or other substitute and think it's a 100 grain charge. It is actually MUCH more!
On your can/bottle of BP Substitute, it will clearly say that it should be used BY VOLUME as a BP substitute. That infers (but doesn't say) that it should not be substituted by weight.
OK - I'm done - just didn't want anyone to get a big SURPRISE! :(

IM jaybe :)

RE: I WAS SURPRISED?
 

everywhere i read said that you CANT weight a charge of blackpowder because powder is MEASURED by VOLUME not weight. thats why i was SURPRISED that geox 2f was so close to weighted charge vrs volume charge.so, i guess reading i was doing was WRONG or they were talking about the substitiute powders as you have said.they always said BLACKPOWDER not others. take care.

RE: I WAS SURPRISED?
 

YESS,

It just ain't necessary to weigh BP charges, if one isas consistent as you seem to be in throwing them with a volume measure. There'd be no benefit at all, because even a full grain difference in the charge weight of black powder will only cause a variation in velocity of around 30 FPS or LESS!

Since a load can have shot-to-shot variation of up to 150 FPS and still be accurate, there's just no reason to weigh the stuff.

RE: I WAS SURPRISED?
 

i agree.that 35 year old brass thompson 50-120 measure was very accurate,within .05 to .06 of a GRAIN .