http://www.ilrc.ucf.edu/powders/sample_detail.php?powder_id=246
and select the powder from the drop down
Heres another that looks a lot like the above.
View attachment 988922
Don't want to post endless pictures but for example AA#2 and AA#9 look close,
Lots of the stick powders look pretty close as well.
Even with powders that are say both rifle powders and sort of close burn speed wise using H335 when the load called for BLC(2) would not work out well (but you might get away with out a blown up gun but then you might not)
I sure would not want to guess a powder by looking at it......call me chicken but I still have 2 eyes, 10 fingers, and no blown up guns (yet)-(note sadly I am missing a few brain cells, called old age
)
If the jar was a flake/ball/stick powder and what was in it did not match the general shape it should be you would know it was wrong but knowing it is right is what is needed.