Powder weight different ???

[Dosh]

Made me remember this article. Seems powders are manufactured with a small amount of moisture and can dry out.
http://bulletin.accurateshooter.com...nges-in-humidity-can-alter-powder-burn-rates/

^ This is the info I was looking for. I'm dumping the old dry stuff, not much of a loss and much safer this way. Thanks Barrelnut.