Are they all the same type or 6 different ones? If they are all the same and seem fine then I would say it's worth looking for info. If there 6 different types then you need to decide if you really want to come up with 6 different recipes or tests, etc. If they are pistol powders depending on what it is ya gotta figure that ya can get over 1K rds out of a typical can of powder, if there rifle then 150 or so give or take what it is. Free is good, figure out your time involved and go from there I say.