I was loading up some 22-250 tonight and when the powder measure got low I grabbed another can of IMR-4895 and poured it in. I noticed it almost seems a little reddish in colour and seems maybe dustier than usually although I'm not sure as its been a while since I last reloaded. Then I checked my measure on the scale and the charges were really light compared to what it was throwing before. I drained the powder and opened another new can which was airtight as well and it weighed light as well. The powder is aprox. 15 yrs old but so was the other stuff. What gives?